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LpR105 | Sept/Oct 2024  |  See subscription options

Interview with CIE's VP Technical, Tony Bergen
Cost-saving Potential of Zonal Lighting
Re-entrainment after Seasonal Clock Changes

Editorial: Intelligent Lighting, Global Standards, and Health

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COMMENTARY (p8)
Will AI Make Research into Human Response to Light Obsolute?
by Professor Jean-Paul LINNARTZ, Professor at Eindhoven University of Technology

INTERNATIONAL LIGHTING NEWS (p10)

CIE INTERVIEW (p20)
Global Leadership in Lighting – CIE's Role in Driving Technology, Tony BERGEN, Vice-President Technical of CIE
by LED professional Editors

PROJECTS (p26)
6-star Hospitality Approach for the Shopping Mall Nanjing in China
by Lichtvision Design

LIGHTING-DESIGN (p36)
Transforming General Lighting – The Cost-saving Potential of Zonal Lighting
by Matthias Boeser and Dr. Thomas Schielke, ERCO

LIGHTING RESEARCH (p42)
Days to Re-entrainment Following the Spring and Autumn Changes in Local Clock Time: Beyond Simple Heuristics
by Mark S. Rea, Rohan Nagare, John D. Bullough, and Marina G. Figueiro

HORTICULTURAL LIGHTING (p52)
LED Lighting in Horticultural Applications – A 2024 Update
by Prof. Erik RUNKLE, Michigan State University

EVENTS (p54)
LED professional Symposium 2024, LpS Digital Summit & LpS Awards
by Luger Research e.U. / LED professional

LPS DIGITAL TALKS (p56)
Expert Talks on Light – Time Matters, Shining Light on Metabolic Health
by Good Light Group, Daylight Academy, Society for Light Treatment and Biological Rhythms, and Luger Research

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ARCHIVE

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LpR104 | July/Aug 2024  |  See subscription options

Standards Beacon: Insights from CIE's VP, Peter Thorns
Future of 3D Printed Lighting
Lighting's Effects on Material Perception

Editorial: Serving the Lighting Design and Lighting Industry Community at the Next Level

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COMMENTARY (p8)
Roadmap to “Lighting 4.0” Era and the SSL2 (Sustainable Smart Lighting ⊗ Solid State Lighting) Concept
by Professor Georges ZISSIS, Professor and Vice-deal for the Faculty of Science and Engineering at the Toulouse University (France)

INTERNATIONAL LIGHTING NEWS (p10)

CIE INTERVIEW (p20)
The Beacon of Standards – Insights from CIE’s VP on the Evolution of Lighting Technology & Design, Peter THORNS, Vice-President Standards at CIE
by LED professional Editors

PROJECTS (p26)
Jil Sander New Bond Street Store, London
by Lichtvision Design

ECO-DESIGN (p36)
Illuminating the Future with Sustainable 3D Printed Lighting Solutions
by Philips MyCreation - A Lighting Brand by Signify

TECHNOLOGY (p40)
Adoption of Narrowband Red Phosphor Promises Improved Quality of Light in General Lighting
by Adil SIDIQI, Vertical Segment Manager, Future Lighting Solutions

LIGHTING DESIGN (p44)
The Impact of Lighting on the Visual Perception of Material Surfaces
by MMag. Martina ASCHER and Dipl.-Ing. Johannes WENINGER, Bartenbach

AUTOMOTIVE LIGHTING (p52)
The Intersection of Innovation: Xavier Denis Discusses the Convergence of Architectural and Automotive Lighting
by Xavier DENIS, Head of Technical Support & Marketing at Nichia

LPS DIGITAL TALKS (p56)
Expert Talks on Light – Time Matters, Shining Light on Metabolic Health
by Good Light Group, Daylight Academy, Society for Light Treatment and Biological Rhythms, and Luger Research

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LpR103 | May/June 2024  |  See subscription options

Interview with Dr. Jennifer Veitch, President of CIE
Environmental Impact of LED Luminaires
The Future of Scan-To-BIM in Lighting Design

Editorial: Navigating the Future of Lighting with Science and Innovation

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COMMENTARY (p8)
A Roadmap for Light and Health
by Prof. Dr. Manuel SPITSCHAN, Professor for Chronobiology and Health at the Technical University of Munich and Max Planck Research Group Leader at the Max Planck Institute for Biological Cybernetics

INTERNATIONAL LIGHTING NEWS (p10)

CIE INTERVIEW (p20)
Lighting the Way Forward – A Comprehensive Look at the CIE's Strategic Vision for the Future of Lighting, Dr. Jennifer Veitch, President of CIE
by LED professional Editors

UL INTERVIEW (p26)
Circadian Tools Advance the Health and Lighting Market –
Adam Lilien, Global Business Development Manager of Lighting at UL Solutions
by LED professional Editors

ECO-DESIGN (p30)
Environmental Impacts of LED Luminaires, Recycling Practices, and Recommendations for a More Sustainable Lighting Industry
by Dr. Sebastian Knoche, Trilux; Dipl.-Ing. Marina Proske, Fraunhofer IZM

MICRO-OPTICS (p40)
The Promising Future of Free-form Micro-Optics in Mobility Interiors
by Christian Forstner, Head of Sales at Seisenbacher

LIGHTING DESIGN (p42)
The Future of Scan-To-BIM in Lighting Design
by Martin Huber, Co-Founder & CEO of Metaroom by Amrax

MARKET REPORT (p50)
Solid-State Lighting Market Report – ASIA
by Dr. J. Norman Bardsely, Chief Analyst at International Solid-State Lighting Alliance

LPS DIGITAL TALKS (p56)
Expert Talks on Light – Time Matters, Shining Light on Metabolic Health
by Good Light Group, Daylight Academy, Society for Light Treatment and Biological Rhythms, and Luger Research

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LpR102 | Mar/Apr 2024  |  See subscription options

Light + Building Post-Show Reports and Interviews
Horticulture LEDs to Boost Vertical Farming
Impact of LEDs on Global Warming

Editorial: Exploring the New Era of Responsible Lighting

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COMMENTARY (p8)
Light Enhances Our Lives
by Dr. Anne Berends, Program Director Life Science at Seaborough

LIGHT + BUILDING 2024 – NEWS (p10)

LIGHT + BUILDING (p22)
Groundbreaking Trends and Technologies
by LED professional Editors

LIGHTINGEUROPE (p30)
From Alarming Figures to Lighting Non-compliance to Constructive Solutions
by Elena Scaroni, Secretary General of LightingEurope

LIGHTING BUSINESS (p32)
Zumtobel and Pininfarina: Lighting Technology Pioneer Partners up with Design Expert to Shape the Future of Lighting
by Zumtobel

OPTICS (p36)
Free-form Micro-Optics in Automotive Applications
by Dr. Daniela Karthaus, Lighting Technology & Optics Expert at FORVIA HELLA

HORTICULTURE (p40)
Horticulture LEDs to Boost Vertical Farming Efficiency
by Alexander Gerfer, Adithya Madanahalli, and Johann Waldherr from Würth Elektronik eiSos

REPORT (p44)
Solid-State Lighting Report – The Impact of LEDs on Electricity Consumption and Global Warming
by Dr. J. Norman Bardsely, Chief Analyst at International Solid-State Lighting Alliance

DESIGN (p48)
Eco-Innovation in Lighting: LCA-CALC Leads the Way in Sustainable Lighting Solutions
by Tiphaine Treins, Founder and Head of Temeloy

CONTROLS (p52)
Connecting Lighting Design and Circadian Research with AI
by Dr. Adrià Huguet-Ferran, Founder & CTO of KUMUX

SIMULATION (p56)
Digital Twin Architecture for Lighting Infrastructure in the Context of Front-End Industry 4.0
by Alex Fischer, Product Manager at SimScale

LPS DIGITAL TALKS (p60)
Expert Talks on Light – Micro-Optics in Automotive Lighting
by FORVIA HELLA

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LpR101 | Jan/Feb 2024  |  See subscription options

Exploring Cross-Disciplinary Lighting Innovations and LpS Digital Awards
Optical Design with Jennifer Aspell
Solid State Lighting Report

Editorial: Exploring the New Era of Lighting Excellence

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COMMENTARY (p8)
The Future of Lighting
by Lawrence Lin, Founder of Lighting Recipe Studio

MUST SEE INNOVATIONS @ LIGHT + BUILDING
INTERNATIONAL LIGHTING NEWS (p10)

LIGHTING INTERVIEW (p24)
Illuminating the Path: A Visionary Journey in Optical Innovation
Jennifer Aspell, CEO of BrightView Technologies

LPS DIGITAL SUMMIT (p30)
Exploring Cross-Disciplinary Lighting Innovations and LpS Digital Awards
by Editors, LED professional

OPTICS (p42)
Redefining Glow: A Breakthrough Diffuser for Downlighting Excellence
by Katharina Keller, Director of Optics at Zumtobel Lighting

REPORT (p40)
Solid-State Lighting Report
by Dr. J. Norman Bardsely, Chief Analyst at International Solid-State Lighting Alliance

CONTROLS (p44)
KUMUX. An Innovative Software Approach for Dynamic Lighting
by KUMUX, Advertorial

ECODESIGN (p48)
Illuminating Sustainability: Zumtobel's Pioneering Circular Economy Venture
by Zumtobel Lighting

MEASUREMENT (p52)
Measurement of the Luminous Flux More Accurate
by Florian Hockel, Segment Leader LITE, Lamps and Multimedia Products at TÜV SÜD

LPS DIGITAL TALKS (p54)
Expert Talks on Light – Micro-Optics in Automotive Lighting
by HELLA-FORVIA, PHABELOuS Pilot Line

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LpR100 | Nov/Dec 2023  |  See subscription options

Professor Shuji Nakamura's Blueprint for a Brighter Future
Thoughts from a Visionary: Monica Luz Lobo
Near-Infrared Light: A Breakthrough Clinical Study

Editorial: LpR100

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COMMENTARY (p8)
Prof. Shuji Nakamura’s Blueprint for a Brighter Tomorrow
by Prof. Shuji Nakamura, Professor and Nobel Prize Winner, Physics 2014

INTERNATIONAL LIGHTING NEWS (p10)

LIGHTING INTERVIEW (p20)
Lighting the Way Forward: Thoughts from a Visionary in the Field
Mônica Luz LOBO, IALD President

LIGHTING DESIGN (p28)
Zerlina Hughes, Creative Director Studio ZNA, and the National Portrait Gallery
by Bronwen ROLLS, The Doing Collective

Tailored Lighting Intervention to Promote Entrainment in Myeloma Transplant Patients:
A Field Study (p38)
by Prof. Mariana G. FIGUEIRO and Allison ANDERSON, Icahn School of Medicine at Mount Sinai

Unlocking the Health Benefits of Near-Infrared Light: A Breakthrough Clinical Study (p48)
by Dr. Anne BERENDS, Tom HILGERINK, and Dr. Mike KRAMES, Seaborough

TECHNOLOGY (p58)
The Luminous Landscape: Light-Loggers and Their Role in Modern Lighting
by Dr.-Ing. Oliver STEFANI and Prof. Björn SCHRADER, Lucerne University of Applied Sciences and Arts

Beyond Ecodesign: The Expanding Horizons of Sustainable Lighting (p64)
by Arno GRABHER-MEYER; Tawsif FAISAL, V-Research

Comfortable LED Upgrade for Sophisticated Office Lighting (p74)
by Nichia

AUTOMOTIVE SPECIAL (p78)
Lumileds’ Dirk Vanderhaeghen on the Future of Automotive Lighting
by Siegfried Luger, Publisher of LED Professional

ISAL 2023 – Symposium and Exhibition Review (p84)
by Editors, LED professional

OLED Lighting Technology Brings Beauty and Safety to the Road (p94)
by OLEDWorks

From Computers to Cars: Microchip’s Ethernet Leap into Automotive Illumination (p96)
by Dipl.-Phys. Martin MILLER; Microchip Technology

Future of Vehicle Lighting: The Role of Measurement Technology (p98)
by Oliver ESTERL, Sales & Product Manager, Instrument Systems

LPS DIGITAL (p100)

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LpR99 | Sept/Oct 2023  |  See subscription options

Interview: Janick Ihringer, ams OSRAM p20
Matter for Professional Lighting, Tridonic p34
Vitamin D Light Treatment with SSL, Bolb p44

Editorial: Issue 99: Paving the Way to a Luminous Milestone

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COMMENTARY (p8)
Five Key Trends Reshaping Lighting
by Nicolas MARTIN, LVHM Sustainable Store Planning Manager

INTERNATIONAL LIGHTING NEWS (p10)

LIGHTING INTERVIEW (p20)
Janick Ihringer, VP & GM Business-Line Illumination, ams OSRAM
compiled by Editors; LED professional

LIGHTING DESIGN (p26)
How Beauty Could Actually Save Our Brain
by Martina FRATTURA, M.Sc., Beauty-informed Lighting Designer and Independent Researcher

LIGHTING DESIGN (p30)
Wallwashing: Benefits and Tips for Perfect Vertical Illuminations
by ERCO

LIGHTING CONTROLS (p34)
Matter for Professional Lighting
by Dr. Markus BECKER, Software Engineer Embedded Systems IoT at Tridonic

LIGHTING SOLUTION – ADVERTORIAL (p40)
IoTH by Techno: Pioneering the Next Wave of Integrated Connectivity
by Techno

HUMAN CENTRIC LIGHTING (p44)
Enhancing Human Health with Solid State UVB Vitamin D Treatment
by Frank HARDER, MSc. EE, Executive Vice President/CRO, Bolb

LPS DIGITAL – EXPERTS TALKS ON LIGHT (p50)
Improving Light to Support Our Shared Natural Ecosystem and Dark Sky Initiatives
by Willem Sillevis Smitt, Senior Director of Strategic Marketing at Lumileds

HORTICULTURE LIGHTING (p52)
Controlled LED Lighting for Horticulture: A Review
by Emmanouil D. FYLLADITAKIS, Electrical Engineer, University of West Attica, Greece

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LpR98 | July/Aug 2023  |  See subscription options

Interview: Kanetaka Sekiguchi, Citizen Electronics p20
Matter: Unleash Your Smart Home's Potential, Signify p28
Sustainability in Lighting Control Systems, DALI Alliance p56

Editorial: Efficient Lighting – Illuminate Responsibly

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COMMENTARY (p8)
Putting Light Users First: Health, Well-being and Socio-Economic Impact
by Jan DENNEMAN, Chairman of the Good Light Group

INTERNATIONAL LIGHTING NEWS (p10)

LIGHTING INTERVIEW (p20)
Kanetaka SEKIGUCHI, President and CEO of Citizen Electronics
compiled by Editors; LED professional

AGRICULTURE (p24)
Lighting Control Systems for Agriculture 
by Steve ROBERTS, Innovation Manager at RECOM Power

SMART HOME (p28)
Smart Home – The Journey from Cool Gadget to Ubiquitous Infrastructure
by Musa UNMEHOPA, Head of Wireless Standards & Regulations at Signfiy 

CONTROLS (p32)
Sustainability in Lighting Controls
by DALI Alliance

LIGHTING SOLUTION – ADVERTORIAL (p36)
Re-Fit Lighting Solution: Backgrounds – Lighting Concept – Business Success
by Peter HAUMER, Head of Technical Sales at Lumitech/Kiteo

CONTROLS (p40)
Automotive LED Driver Power Conversion Topology Guide
by Analog Devices

LPS DIGITAL (p44)
Expert Talks on Light

GLOBAL LIGHTING DIRECTORY (p46)
Final Systems Providers

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LpR97 | May/June 2023  |  See subscription options

COVER STORY – WÜRTH ELEKTRONIK p28
Lighting Control for Food Production

Interview: Hugo Rohner, CEO Tridonic p20
Semiotics – The Language of Lighting, ERCO p42
Smart City Sensor Awards, Zhaga Consortium p56

Editorial: The Dimensions of Light

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COMMENTARY (p8)
Phototherapy and UV-A LED Technology
by Anton SONNEVELD, Business Development Manager LEDs EMEA; Broadcom

INTERNATIONAL LIGHTING NEWS (p10)

LIGHTING INTERVIEW (p20)
Hugo ROHNER, Chief Executive Officer, Tridonic
compiled by Editors; LED professional

VERTICAL FARMING – COVER STORY (p28)
Lighting Control for Food Production
by Alexander GERFER, Johann WALDHERR, Harun ÖZGÜR; Würth Elektronik eiSos

PROJECTS (p34)
Guangzhou International Finance Center (IFC)
by Lichtvision Design

HUMAN CENTRIC LIGHTING (p38)
The Power of Good Light Indoors: Boosting Sleep, Alertness, Mood and Productivity
by Jan W. DENNEMAN, Marina C. GIMÉNEZ, Bruno M.J. SMETS, Roger SEXTON,
Marijke C.M. GORDIJN; Good Light Group

LIGHTING DESIGN (p42)
The Language of Lighting: Applying Semiotics in the Evaluation of Lighting Design
by Dr. Thomas SCHIELKE, Architect and Lighting Design Trainer at ERCO

INTELLIGENT LIGHTING (p56)
Recognizing Excellence in Smart City Sensors
by Zhaga Consortium

LPS DIGITAL (p64)
Expert Talks on Light

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LpR96 | Mar/Apr 2023 

Interview: Mark PUGH p20
Optimum Melanopic Light Source, Signify Research p28
LUMAWISE Motion Sensor, TE Connectivity p48
Cooling Performance for LEDs, Fischer Elektronik p58

Editorial: Light on ChatGPT

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COMMENTARY (p8)
Shaping Leading Edge Technologies
by Alexander GERFER, Managing Director & CTO, Würth Elektronik

INTERNATIONAL LIGHTING NEWS (p10)

LIGHTING INTERVIEW (p20)
Leader in Photonics Innovation
Mark PUGH, Executive Vice-President Marketing, LUMINUS Devices

INTEGRATIVE LIGHTING (p28)
Healthy Daytime Indoor Lighting – How to Design the Optimum Melanopic Light Source
by Dr. René T. WEGH, Principal Scientist and Dr. Ir. Mart P.J. PEETERS, Scientist; Signify Research

PROJECTS (p38)
UK HOUSE London
by Karen IHLAU, Design Director, et al.; Lichtvision Design

OUTDOOR LIGHTING – Advertorial (p48)
LUMAWISE Motion Sensor Helps Cities Improve Energy Savings Without Compromising Safety
by Jonathan CATCHPOLE, System Architect, TE Connectivity

LIGHTING TRENDS (p54)
The Anatomy of Better Lighting
by LightingEurope

THERMAL MANAGEMENT (p58)
Cooling Performance for LEDs
by Dipl.-Phys. Ing. Jürgen J. HARPAIN, R&D Manager, Fischer Elektronik

LPS DIGITAL (p64)
Expert Talks on Light

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LpR95 | Jan/Feb 2023 

Interview: Alessandro CILANO p20
Wireless Lighting Networks, EnOcean p44
Thermal & Optical Simulations, SimScale & CADFEM p52,56

Editorial: Holistic Design Approach

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COMMENTARY (p8)
More Durable, Safer and Sustainable
by Fariyal KHANBABI, CEO at Dialight

INTERNATIONAL LIGHTING NEWS (p10)

LIGHTING INTERVIEW (p20)
Leader in Optical Solutions
Alessandro CILANO, Head of Global Product Marketing Illumination, ams OSRAM
by Editors, LED professional

LPS DIGITAL SUMMIT (p24)
Leader in Optical Solutions
LpS Digital Summit – Keynotes, Panel Discussion, Awards
by Editors, LED professional

PROJECTS (p36)
Covestro Headquarters
by Raoul HESSE, Founding Partner, Lichtvision Design

NETWORKS (p44)
Wireless Lighting Networks: Comfort and Intelligence for Workplaces
by Matthias KASSNER, Vice President Product Marketing, EnOcean

THERMAL SIMULATION (p52)
Luminaires Performance Simulation
by Alex FISCHER, Product Manager, SIMSCALE

OPTICS SIMULATION – ADVERTORIAL (p56)
Optics Simulation Based on Accurate Material Models
by Dipl.-Ing. Gerhard FRIEDERICI, Editor; Dipl.-Ing. Matthias NOAK, Head of Optical Lab; CADFEM

LPS DIGITAL (p58)
Expert Talks on Light

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LpR94 | Nov/Dec 2022 

Interviews: Rogier van der HEIDE, Stelios ZEREFOS, Hiroyoshi OGAWA p20-32
Design Tool for Ecodesign Directive, Lumileds p42
Will MicroLEDs Revolutionize the Display Industry? Yole Intelligence p46

Editorial: From Inspiration to Innovation

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COMMENTARY (p8)
Being Ready for the Unexpected
by Matthias KASSNER, Head of Product Marketing at EnOcean; Germany

INTERNATIONAL LIGHTING NEWS (p10)

NEW LIGHTING DESIGN (p20)
Most Inspiring Lighting Designer
Rogier van der HEIDE, Atelier Rogier van der HEIDE; Liechtenstein
by Editors, LED professional

DESIGN & ARCHITECTURE (p28)
From Architecture to Lighting Design and Education
Professor Stelios ZEREFOS, Hellenic Open University; Greece
by Editors, LED professional

NICHIA (p32)
Interview with Nichia Corporation's President & CEO
Hiroyoshi OGAWA, Nichia; Japan
by Editors, LED professional

LIGHTING DESIGN PROJECT (p34)
Hospitality Focus
by Laura CIZAUSKAITE, High-End Hospitality Lighting Expert at Lichtvision Design; Germany

DESIGN TOOL (p42)
Ecodesign Directive: Success in Stimulating Demand for Sustainable Lighting
by Dr. Wouter SOER, Director of Product Development at Lumileds; The Netherlands

MICROLEDS (p46)
Will MicroLEDs Revolutionize the Display Industry?
by Dr. Eric VIREY, Senior Market and Technology Analyst at Yole Intelligence; USA

LPS DIGITAL (p54)
Impact of Daytime Illuminance on Cognitive Functioning and Alertness
by Renske LOK, Postdoctoral Researcher at Stanford University; USA

CONNECTED LIGHTING (p58)
Smart Buildings vs. Intelligent Buildings: Why Intelligent Buildings Are the Better Choice
by Barry MULLIGAN, Marketing Manager at Analog Devices; USA

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LpR93 | Sept/Oct 2022 

Interview: Prof. Georges ZISSIS, Toulouse 3 University p20
Vertical Illumination, Bartenbach p36
Retrofit Linear Tube Lampes p52

Editorial: Research – Innovation – Design

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COMMENTARY (p8)
Replacing Twilight with Good Light
by Jan DENNEMAN, Chairman of the Good Light Group; The Netherlands

INTERNATIONAL LIGHTING NEWS (p10)

LIGHTING INTERVIEW (p20)
Lighting Scientist and Authority
Professor Georges ZISSIS; Toulouse 3 University, France
by Editors, LED professional

LPS DIGITAL (p26)
Impact of Daytime Illuminance on Cognitive Functioning and Alertness
by Renske LOK, Postdoctoral Researcher; Stanford University, USA

LIGHTING DESIGN PROJECT (p28)
Tiffany House, Macau, China
by Lichtvision Design, Clemens SEIPELT, Germany

LIGHTING DESIGN (p36)
Vertical Illumination
by Dipl. Designer Wilfried KURZ, MLL; Bartenbach R&D, Austria

HCL LED – ADVERTORIAL (p42)
Improve Alertness, Focus and Comfort with Biologically Effective Light
by Menno SCHAKEL, Technical Marketing Engineer; Nichia, Germany

AUTOMOTIVE (p44)
Adaptive-Driving-Beam Headlights: A Collaborative Approach to Efficient Manufacturing of Complex Shapes Optical LSR Parts
by Martijn BEUKEMA,  , Francois DE BUYL, Kevin VAN TIGGELEN, TS&D Scientists, Dow Belgium; Jake STEINBRECHER, TS&D Scientist, Dow USA; Hannes RIEGER, Head R&D, ELMET

LAMP TECHNOLOGIES (p52)
Hidden Challenge and Its Solution for Retrofit Linear Tube Lamps
by Dr. Mike KRAMES, Sr. Advisoer and Pieter SIX, CEO; Seaborough Research, The Netherlands

MEASUREMENT (p58)
How to Assess the Eye Safety of VCSELs – Introduction
by Dr. Günther LESCHHORN, Tianyuan CAO, Dr. Karhik IYER; Instruments Systems, Germany

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LpR92 | July/Aug 2022 

MicroLEDs Interview, Prof. J.Y. LIN and H.X. JIANG p20
Prediction of Melatonin Suppression p44
Metamerism and Spectral Power Distribution Adjustment p52

Editorial: From micro-LEDs to Integrative Lighting II

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COMMENTARY (p8)
Modern HCL Designs
by Thomas ZAMPIERI, Senior Product Marketing Manager, OSRAM Digital Systems, Italy

INTERNATIONAL LIGHTING NEWS (p10)

LIGHTING INTERVIEW (p20)
Bright Future for MicroLEDs
Professor Jingyu LIN and Professor Hongxing JIANG, Texas Tech University, Lubbock, USA
by Editors, LED professional

LPS DIGITAL (p26)
Impact of Daytime Illuminance on Cognitive Functioning and Alertness
by Renske LOK, Postdoctoral Researcher, Stanford University, USA

LIGHTING DESIGN PROJECT (p28)
Changzhou Culture Plaza, China
by Lichtvision Design

MICROLEDS (p36)
Development of microLED
by J.Y. LIN and H.X. JIANG, Texas Tech University, USA

HUMAN CENTRIC LIGHTING (p44)
Predictions of Melatonin Suppression During the Early Biological Night and Their Implications for Residential Light Exposures Prior to Sleeping
by Mark S. REA, Rohan NAGARE & Mariana G. FIGUEIRO, Light and Health Research Center, NY, USA

SPECTRAL ADJUSTMENT TECHNOLOGIES (p52)
Metamerism and Spectral Power Distribution Adjustment, the New Paradigm of LED Technology to Improve the Lighting Applications
by Francesc JORDANA CASAMITJANA, Spain

DALI (p58)
DALI-2 and D4i Certification Support Interoperability and Sustainable Lighting
by Paul DROSIHN, General Manager, DALI Alliance, UK

GOOD LIGHT (p62)
Good Light for a Healthier and Happier Life
by Jan DENNEMAN, Chairman Good Light Group, The Netherlands

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LpR91 | May/June 2022 

Bright Future for micro-Pixelated Light Prof. Martin DAWSON p20
Recommendations for Daytime, Evening, and Nighttime
Indoor Light Exposure p44
Living on the Moon with LED Technologies p68

Editorial: From micro-LEDs to Integrative Lighting

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COMMENTARY (p8)
Fear of Falling
by Mariana G. FIGUEIRO & Mark S. REA,
Icahn School of Medicine at Mount Sinai, Light and Health Research Center (LHRC), New York

INTERNATIONAL LIGHTING NEWS (p10)

LIGHTING INTERVIEW (p20)
Bright Future for micro-Pixelated Light
Prof. Martin DAWSON, University of Strathclyde, Glasgow, UK
compiled by Editors, LED professional

LPS DIGITAL (p32)
How to Address the Lighting Industry's Concerns Regarding Product Compliance Online
by Marion EBEL, Senior Policy Manager, LightingEurope

LIGHTING DESIGN PROJECT (p34)
Daylighting & Artificial Lighting for Humboldt Forum in Berlin
by Lichtvision Design

HORTICULTURE – ADVERTORIAL (p42)
How CSA Group’s Lighting Center of Excellence is Helping to Test a Brighter Future for Horticulture
by KC Fletcher, CSA Group

INTEGRATIVE LIGHTING (p44)
Recommendations for Daytime, Evening, and Nighttime Indoor Light Exposure to Best Support Physiology, Sleep, and Wakefulness in Healthy Adults
by Timothy M. BROWN, George C. BRAINARD, Christian CAJOCHEN, et al.

UVC (p58)
Why UV-C Technology Needs to be a Standard Feature in Building and Renovation Design
by Marion EBEL, Senior Policy Manager and Sophia EHMKE, Policy Officer; LightingEurope

CIRCUIT PROTECTION (p60)
Lamination Process for Flexible Electronics and LED Technology
by Volker KOKULA, R&D Manager at Lumitronix

LUNARK (p64)
Living on the Moon with LED Technologies
by Daniel HAN, VP Business Development at Beijing Yuji International

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LpR90 | March/April 2022 

Interview with Zumtobel CEO, Dr. Alfred FELDER p20
UVC Light Sources and Reflectors p50/54
Outlook on the Future of LiFi p46

Including DALI Lighting Award Winners
Editorial: Retrospect and Outlook

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COMMENTARY (p8)
Lighting Design as a Cross-Disciplinary Science
by Ian ASHDOWN, Cofounder of All Things Lighting Association (ATLA)

INTERNATIONAL LIGHTING NEWS (p10)

LIGHTING INTERVIEW (p20)
"Leading by Example and Respect"
Dr. Alfred FELDER, CEO Zumtobel Group
compiled by Editors, LED professional

LPS DIGITAL (p30)
How to Address the Lighting Industry's Concerns Regarding Product Compliance Online
by Marion EBEL, Senior Policy Manager, LightingEurope

LIGHTING DESIGN PROJECT (p32)
Wuyuanhe Stadium, China
by Lichtvision Design

AWARDS (p40)
DALI Lighting Awards 2021
by DALI Alliance

LIFI (p46)
An Outlook on the Future of LiFi, from the City where the Compact Disc was Born
by Jean-Paul LINNARTZ, Prof. Dr. Ir., Signify and Eindhoven University of Technology

UVC (p50)
The Invisible Light Revolution
by Paul BLANC, Bolb

UV REFLECTORS (p54)
Durability Enhancement of Formable Reflectors for UV-Sterilization
by Tobias TITZ, Dr., Project Manager at ALANOD

PRESENCE SENSORS (p58)
Presence Sensors for Warehouse Lighting Control – Radar vs PIR
by Victor VERBOVSKY, CEO of Intelar

LED DRIVERS (p62)
Keeping EMI from LED Drivers Under Control
by Frederik DOSTAL, Analog Devices

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LpR89 | Jan/Feb 2022 

Interview with Professor Harald HAAS p20
Personalized Human Centric Lighting p38
UV-C Disinfection: Research and Applications p48-60

Including the Lecture and Product
Award Winners of LpS Digital

Editorial: LpS Digital Awards
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COMMENTARY (p8)
Shaping the Future of the Lighting Industry Together
by Ourania GEORGOUTSAKOU, Secretary General of LightingEurope

INTERNATIONAL LIGHTING NEWS (p10)

LiFi INTERVIEW (p20)
"With LiFi, We See a Shift From a Device to a Platform in Lighting"
Professor Harald HAAS, University of Strathclyde
compiled by Editors, LED professional

LPS DIGITAL (p30)
The Zhaga 2021 Updates
by Dee Denteneer, Secretary General of the Zhaga Consortium

LIGHTING DESIGN PROJECT (p32)
Glass House Garden Room, Seoul
by Lichtvision Design

REGULATIONS (p36)
What the Lighting Industry Needs to Know about the EU Ecodesign and Energy Labelling Regulations
by Elena SCARONI, LightingEurope

HCL (p38)
When Human Centric Lighting Gets Personal: p-HCL
by Jean-Paul LINNARTZ, Prof. Dr. Ir., Signify and Eindhoven University of Technology; Charikleia PAPATSIMPA, Ph.D., Eindhoven University of Technology

LIGHTING MODULE – ADVERTORIAL (p44)
LUXTECH Offers First Compelling Flex Modules Designed to Replace Traditional Rigid Modules: LUXroll (UL Listed)
by LUXTECH

UVC RESEARCH (p48)
The Virucidal Effects of 405 nm Visible Light on SARS-CoV-2 and Influenza A Virus
by Adolfo GARCIA-SASTRE, PhD, Global Health & Emerging Pathogens Institute and Icahn School of Medicine at Mount Sinai; et al.

UVC LEDs (p58)
Fundamentals of Disinfection Device Development
by Dominik KÖCK, MSc, Würth Elektronik eiSos

LED DRIVERS (p62)
How to Use LTspice to Produce Bode Plots for LED Drivers
by Keith SZOLUSHA and Brandon NGHE, Analog Devices

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LpR88 | Nov/Dec 2021 

Interview with Lumileds CEO, Matt RONEY p20
Applications in Focus – Street/Tunnel, Retail, Horticulture p30-48
Wireless Communication – Bluetooth and LiFi p54-84

Including the Good Light Guide
Lightfair 2021 Awards

Editorial: Performance in Applications

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COMMENTARY (p8)
Flexible and Future-proof Design of Co-working Spaces
by Matteo MENGHINI; Global Work Cluster Manager at ERCO

INTERNATIONAL LIGHTING NEWS (p10)

BUSINESS – INTERVIEW (p20)
"We Do The – Never Before Possible"
Matt RONEY, Chief Executive Officer of Lumileds, USA
compiled by Editors, LED professional

LPS DIGITAL (p28)
Zhaga Summit 2021: How Zhaga Addresses Sustainability and Circular Economy
by Reinhard LECHELER, ams OSRAM

STREET LIGHTING – FUTURE STUDY (p30)
Lighting and Surface Design of Tunnels
by Stephan WEGSTEIN, Director Product Marketing Flash; Hakan YILMAZER, Head of Application Management Lighting; Infineon, Germany

TUNNEL LIGHTING – RESEARCH STUDY (p36)
Illumination and Simultaneous Germ Reduction with Light
by Wilfried POHL, Mag., Director Research; Isabel ARNST, MSc., Research Assistant; Bartenbach, Austria

RETAIL LIGHTING – CASE STUDY (p44)
Lighting in Retail — How it Increases Sales 
by Giovanni VECCHIO, Head of Sales and Marketing for General Lighting, Nichia Europe

HORTICULTURE LIGHTING (p48)
Optics and Outlook for Horticulture Lighting
by Bernie DANIELS, OEM Sales Manager and Sadi SAFARALIEV, Optical Design Engineer; Carclo Optics, United Kingdom

BLUETOOTH NETWORKS (p54)
9 Resources That Showcase the Realization of Bluetooth Networked Lighting Control in Large-Scale Commercial Environments
by Jason MARCEL, Marketing Program Manager, Bluetooth SIG, USA

LIFI COMMUNICATION (p58)
Selecting a LiFi Standard when Building your LiFi Product
by Musa UNMEHOPA, Head of Ecosystems and Alliances for LiFi at Signify, The Netherlands

GOOD LIGHT GUIDE (p62)
Good Light Guide for Healthy, Daytime-active People
by the Good Light Group

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LpR87 | Sept/Oct 2021 

Interview with Cree LED President, Claude DEMBY p22
Innovative Automotive and Disinfection Focus p28-46
Enlighten Your Clock – How Your Body Tells Time p52


Special edition with a comic book!

Editorial: More Than Trends

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COMMENTARY (p8)
Lighting Future
by Stephan WEGSTEIN, DI; Business Development Manager EMEA for Flash Memories at Infineon Technologies

INTERNATIONAL LIGHTING NEWS (p10)

LPS DIGITAL (p20)
ipRGC Sensitive Optimized LED Spectrum and Its Application in Color Temperature Lighting Solutions
by Xavier DENIS, Nichia

BUSINESS – INTERVIEW (p22)
Powering Customer Growth Through LED Innovation
Claude DEMBY, President of Cree LED, USA
compiled by Editors, LED professional

AUTOMOTIVE – ADVERTORIAL (p28)
Faster Automotive Lamps Approval
by GL Optic

AUTOMOTIVE (p30)
Projected Safety with High-resolution LED Headlamp Concept
by Stefan GROETSCH, Dipl.Ing., Principal Key Expert Application Fields; Joachim REILL, Dipl. Ing., Senior Director; System Solution Engineering at ams OSRAM

DUAL FUNCTION ILLUMINATION (p34)
Illumination and Simultaneous Germ Reduction with Light
by Thomas WALENTOWSKI, Dipl.-Ing.(FH); Head of Business Unit Light & Sanitization and Head of Marketing at AURORA Lichtwerke

UV MEASUREMENT (p36)
Measurement Systems and Calibrations for UV Radiation
by Denan KONJHODZIC, Dr., Product Manager at Instrument Systems

UV LED CURING (p40)
High Performance LED Sources Enable Innovation in Manufacturing
by David ARMITAGE, Scientist, Baldwin UV

TERMINAL BLOCK - ADVERTORIAL (p48)
Safe and Stable Connection with the SMD PCB Terminal Block from WAGO's 2065 Series
by WAGO

SOLAR SIMULATION (p50)
LED Solar Simulation Technologies
by Sam ROGERS, Content Writer and Editor at Ushio; Fumihiko ODA, Dr., SSL Sales Strategy Deputy Manager at Ushio

GOOD LIGHT (p54)
Personal Good Light – The Second LED Revolution
by Jan DENNEMAN, Chairman Good Light Group

ENLIGHTEN YOUR CLOCK (p56)
How Your Body Tells Time
by Weinzaepflen, C.; Spitschan, M. (Ed.) (2021). DOI: 10.17605/OSF.IO/ZQXVH

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LpR86 | July/Aug 2021 

Business Interview with SSC's Founder & CEO Chung-Hoon LEE p22
DALI+ Interview with Alliance General Manager Paul DROSIHN p30
Disinfection with UV-C Light Sources and Materials p44, p48

Editorial: Inspiration

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COMMENTARY (p8)
Dear Lighting Enthusiasts!
by Andreas SCHULZ, Lighting Designer, Germany

INTERNATIONAL LIGHTING NEWS (p10)

LPS DIGITAL (p20)
Healthful and Integrative Lighting; Lighting Metrology and Recommendations for Non-Visual Effects of Light
by Luc J.M. SCHLANGEN, Ph.D.

BUSINESS – INTERVIEW (p22)
The Tiger Leaves Its Skin Behind
Chung-Hoon LEE, Founder and CEO of Seoul Semiconductor, South-Korea
compiled by Editors, LED professional

DALI ALLIANCE – INTERVIEW (p30)
DALI+ Insights
Paul DROSIHN, General Manager, DALI Alliance, UK
compiled by Editors, LED professional

SUSTAINABILITY (p34)
Repro-light: Sustainable Illumination for People and the Environment
by Wilfried POHL, Mag., Director Research; Johannes WENINGER, Dipl.-Ing., Researcher; Maximilian DICK, MSc., Researcher; Bartenbach, Austria

UV-C TECHNOLOGIES (p44)
Disinfection with UV-C LED and Optics Technologies
by Jonatan KLEE, UV-C LED Account Manager at Nichia, The Netherlands/Germany/Japan

UV-C DESIGN - ADVERTORIAL (p48)
Influence of UVC LED Disinfection on Polycarbonate Materials
by Paul NOWATZKI, Senior Product Expert, Covestro; Rajul RANDIVE, Director Application Engineering, Crystal IS; Sean BRANAGAN, Process Engineering Manager, Crystal IS; USA

THERMOPLASTICS (p52)
Routes in the Development of Simulation Models for Light Scattering Thermoplastics
by Nathalie PFINGSTGRAEF, MSc., Optical Engineer; René KOGLER, Dr., Head of Product Management; Arne SCHMIDT, MSc., Head of Technical Marketing Automotive; Röhm, Germany

THERMAL SIMULATION (p58)
Parametric Design Optimization of an LED System Using Engineering Simulation in the Cloud
by Naghman KHAN, Dr., Senior Product Marketing Engineer at SimScale

SPECTROSCOPY (p60)
Spectroscopy with Broadband visible-NIR and Multi-chip Narrowband SWIR LEDs
by Sam ROGERS, Content Writer and Editor at Ushio; Fumihiko ODA, Dr., SSL Sales Strategy Deputy Manager at Ushio

LED DRIVER (p64)
Dimmable Non-isolated LED Driver with Highest Light Quality and Efficiency
by Michael WEIRICH, Dr., Director Technical Marketing Lighting, Infineon Technologies

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LpR85 | May/June 2021 

LED Business Interview with SAMSUNG's SVP Un Soo KIM p22
Circular Economy in Lighting Design with Mark RIDLER p30
Breakthroughs: ipRGC Tuned LEDs and DALI+ Networks p42, p48

Editorial: Core Trends in Lighting

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COMMENTARY (p8)
Science in the Spotlight for the International Day of Light 2021
by Prof. John DUDLEY, IDL 2021 Steering Committee Chair, France

INTERNATIONAL LIGHTING NEWS (p12)

LPS DIGITAL (p20)
Lighting & Biology with Prof. Robert LUCAS, UK

LED BUSINESS – INTERVIEW (p22)
LED Business in Focus
Un Soo KIM, Senior Vice President of SAMSUNG Electronics, South-Korea
compiled by Editors, LED professional

CIRCULAR ECONOMY – INTERVIEW (p30)
Circular Economy from the Perspective of Lighting and Project Design with
Mark RIDLER, Head of Lighting at BDP, UK
compiled by Editors, LED professional

HCL LIGHTING SOLUTION (p36)
Bringing the Benefits of Natural Light Indoors
by Cristina TANASE, PhD, General Manager NatureConnect by Signify; Inge van der WOUW, Segment and Marketing Manager NatureConnect by Signify; Bianca van der ZANDE, PhD, Senior Scientist/Topic Lead HCL Signify Research, The Netherlands

HCL LED TECHNOLOGY (p42)
ipRGC Sensitivity Optimized LED Spectrum and its Application in Color Temperature Tunable Solutions
by Menno SCHAKEL, Technical Marketing Engineer at Nichia Chemical Europe GmbH; Co-Authors: Sadakazu WAKUI, Kenji ASAI, Shigeharu YAMAUCHI, Xavier DENIS, The Netherlands/Germany/Japan

DALI+ AND WIRELESS TO DALI GATEWAYS (p48)
DALI+ and Wireless to DALI Gateways Increase Connectivity Options for DALI Lighting Networks
by Paul DROSIHN, General Manager, DALI Alliance, UK

WIRELESS CONTROL NETWORKS (p52)
Why Wireless Control Networks Are Taking Over Commercial Lighting
by Jason MARCEL, Marketing Program Manager, Bluetooth SIG, USA

LASER LIGHTING TECHNOLOGY (p56)
High-power Diode Lasers and Rotating Phosphor Converters Revolutionize the White Light Generation Process
by Simon BRITTEN, Dr.-Ing., Technology Manager, Laserline GmbH, Germany

THERMAL RESEARCH (p60)
Package Level Thermal Analysis of White Light-emitting Diodes Based on Local Phosphor Particle Opto-thermal Behavior
by Mohammad AZARIFAR, MSc., Researcher; Ceren CENGIZ, BSc., Researcher; Dr. Mehmet ARIK, Professor | EVATEG Center Ozyegin University, Turkey

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LpR84 | Mar/Apr 2021 

NICHIA Celebrates its 65th Year of Continuous Innovation p22
Key Experts Shed Light on UV-C Disinfection p36
New LiFi Communication Standards Open Market Access p42

Editorial: Innovation Coupled with Sustainability

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COMMENTARY (p8)
Good Light is as Important as Good Food and Good Air
by Jan DENNEMAN, Chairman of the Good Light Group, The Netherlands

INTERNATIONAL LIGHTING NEWS (p10)

LPS DIGITAL (p20)
LiFi Seminar, China

INTERVIEW - NICHIA’S 65th ANNIVERSARY (p22)
Hiroyoshi OGAWA, President and CEO of NICHIA, Japan
compiled by Editors, LED professional

ECODESIGN (p30)
Replaceability of Light Sources and Separate Control Gears
by Carsten MÖLLERS, Dipl.-Kfm., CEO of Green Gems; Werner MOTZ, Electrical Engineering Technician & Master at BASF

DISINFECTION (p36)
UV-C: Disinfection Benefits, Safety, Comfort and Proof Points
by Georg NIEDERMEIER, Dr., EHS Professional at OSRAM; Armin KONRAD, Dr., Senior R&D Director at LEDVANCE; Lukas KASTELEIN, Ing., Standardization and Regulations Professional at Signify, Germany & The Netherlands

WIRELESS COMMUNICATION (p42)
A Closer Look at LiFi Standardization
by Musa UNMEHOPA, Head of Ecosystems and Alliances for LiFi at Signify, The Netherlands

COLOR CONTROLLER (p48)
13-Bit RGBW Color Control for Accurate High-Quality Architectural & Stage Lighting
by Keith SZOLUSHA, LED Driver Applications Manager at Analog Devices, USA

OUTDOOR LIGHTING (p54)
New LED for Outdoor Lighting
by Markus HOFMANN, DI, Senior Key Expert for General Lighting at Osram Opto Semiconductors, Germany

LED TECHNOLOGY (p58)
Multi-Chip LEDs
by Sam ROGERS, Content Writer and Editor at Ushio; Fumihiko ODA, Dr., SSL Sales Strategy Deputy Manager at Ushio, The Netherlands & Japan

SURGICAL LIGHTING (p62)
Why High-End Surgical Lights Have Become Imperative Invasive Equipment
by Ashish GUJARATHI, MBA, SEO Analyst at Allied Market Research, USA

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LpR83 | Jan/Feb 2021 

Winning the Controls Business With Bluetooth Mesh p22
Design Backgrounds for China's Most Prestigious Applications p40
A New Lighting Paradigm With Double Dynamic Lighting p52

Editorial: Reboot With Plenty of Opportunities

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COMMENTARY (p8)
From Kelly to Double Dynamic Lighting
by Henrik CLAUSEN, Director at Fagerhult Lighting Academy, Sweden

INTERNATIONAL LIGHTING NEWS (p10)

LPS DIGITAL (p20)

INTERVIEW - TOWARDS BLUETOOTH MESH (p22)
Patrick DURAND, Worldwide Technical Director, Future Lighting Solutions (FLS), Canada
compiled by LpR Editors

LUMINAIRE DEVELOPMENT (p30)
Measuring the User Acceptance: User-centered Methods and Co-creation Processes in Luminaire Development
by Ganix LASA, Ph.D., Researcher at the Mondragon University, Spain

LIGHT AND HEALTH (p36)
Live Healthier With Light
by Paula MISEIKYTE, Scientific Lead at LYS Technologies, Denmark

LIGHTING DESIGN (p40)
Latest Lighting Design Trends for Top Grade Chinese Hotels
by Carry YU, General Manager & Design Director of CSLC International Lighting Design Co., China

HUMAN CENTRIC LIGHTING (p48)
Human-Centric Lighting Will Usher in Another Once-in-a-Century Golden Era for General Lighting
by James TU, Chairman & Chief Executive Officer of Energy Focus, USA

DOUBLE DYNAMIC LIGHTING (p52)
Dynamic Lighting Complementing the Dynamics of the Sky and Sunlight
by Ellen Kathrine HANSEN, Ph.D., Assoc. Prof., Head of MSc Program and Lighting Design Research Group at Aalborg University, Copenhagen, Denmark

MICRO-LED DISPLAYS (p58)
III-Nitride Nanowire microLEDs on Si Substrate for Next Display Technology
by Ha Quoc Thang BUI, Ph.D.(c), Researcher, Department of Electrical and Computer Engineering, New Jersey Institute of Technology, USA

SIMULATION (p62)
Early Stage Computational Fluid Dynamics (CFD) Design Simulation
by Naghman KHAN, Dr., Technical Writer at SimScale, Germany

UV-LED CURING (p64)
UV-LED Curing Process and Applications
by Stacy HOGE, Marketing Communications Manager at Phoseon Technology, USA

DYNAMIC LIGHTING (p68)
Planar Steerable Luminaires on the Way to Replacing Rotating Projectors
by Noé BORY, MSc., Lead Lighting R&D Engineer at Insolight, Switzerland

LED TESTING (p72)
Short-Pulse Testing Eliminates Self-Heating Errors to Produce True L-I Graphs
by Jeff HULETT; Markus SCHNEIDER, Dr.; Founder and CTO of Vektrex (USA); Characterization of LED Products at OSRAM Opto Semiconductors (Germany)

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LpR82 | Nov/Dec 2020 

Are Lighting Controls Ready for Internet of Things p24
Understanding the Power Formula in the New Ecodesign Regulation p30
Innovative Ways in Lighting Fixture Designs p40

Editorial: A Time to also Rethink Lighting

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COMMENTARY (p8)
Future Strategic Directions for the Lighting Industry
by Ourania GEORGOUTSAKU, Secretary General of LightingEurope, Belgium

INTERNATIONAL LIGHTING NEWS (p10)

REGULATION NEWS (p21)

LPS DIGITAL (p22)

INTERVIEW - IoT Lighting Controls (p24)
Kristopher EVANS, Market Development Manager for Internet of Things (IoT) at Cree Lighting, USA
compiled by Arno GRABHER-MEYER, LED professional

ECODESIGN REGULATION (p30)
The Energy Efficiency Calculation for “Light Sources” Under the New Ecodesign Regulation (EU) 2019/2020
by Fabio PAGANO, Technical Manager at ASSIL (Italian Association of Lighting Manufacturers), Italy

LIGHTING STANDARDS (p36)
Opportunities and Obstacles While Exporting Luminaires to North America and the Middle East
by Hans LASCHEFSKI, Dr., Industry Marketing Manager – Lighting EMEA at UL, Germany

LIGHTING DESIGN (p40)
LED Lighting Fixture Design Between Tradition and Innovation
by Daria CASCIANI, Ph.D. and Manuela CELI, Ph.D., Assistant Professor abd Associate Professor both of Politecnico di Milano - Department of Design, Italy

SPECTRAL ENGINEERING (p48)
Chromaticity Shift Behavior in LED Packages
by Monica HANSEN, Ph.D. and J. Lynn DAVIS, Ph.D., Principal Engineer at LED Lighting Advisors and Director of the Nano-enabled Devices Program at RTI International, USA

THERMAL ANALYSIS (p54)
Analysis of Heat Paths in LED Retrofit Lamps
by Peter W. NOLTE, Ph.D., Research Team Leader at Fraunhofer Application Center for Inorganic Phosphors, USA

MICRO-LED DISPLAYS (p58)
Micro-LED Displays: New Opportunities for Nitride-Based Red LED Technologies
by Atsushi NISHIKAWA, Dr. and Kazuhiro OHKAWA, Prof., CTO of ALLOS Semiconductors and Professor at King Abdullah University, Germany and Saudi Arabia

PHOSPHOR RESEARCH (p64)
Quo Vadis Biogenic Phosphors?
by Rubén D. COSTA, Prof., Professor, Chair of Biogenic Functional Materials at the Technical University of Munich (TUM), Germany

UV-C LIGHT SOURCES (p68)
Characterization of UV Radiation Sources
by Marc BALLBÈ, CEO of Asselum, Spain

UV-C DISINFECTION (p72)
Appropriate Uses for UVC LED Technology for Disinfection Applications
by Theresa L. THOMPSON, Ph.D., Head of Application Scientist at Phoseon, USA

HORTICULTURE LIGHTING (p76)
Optimum LED Lighting for Green Walls
by Amardeep M. DUGAR, Ph.D., Founder and Principal of Lighting Research and Design, India

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LpR81 | Sept/Oct 2020 

The Future Potential of LiFi Communication p24
How the Lighting for Good Initiative will Change Our Minds p34
Modern Lighting Design is Inspired by The Poetics of Darkness p76

Editorial: Secure Decisions in Uncertain Times

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COMMENTARY (p8)
Visual Performance and Cognition by Stephen A. MASON, Dr.
Founder and Head of Sustainable Eye Health, Australia

INTERNATIONAL LIGHTING NEWS (p10)

REGULATION NEWS (p21)

LPS DIGITAL (p22)

INTERVIEW - LIFI COMMUNICATION (p24)
Musa UNMEHOPA, Head of Ecosystems and Strategic Alliances for LiFi at Signify, The Netherlands
compiled by Arno GRABHER-MEYER, LED professional

LIFI PATENTS (p30)
Thrust Area Analysis of LiFi Communication Patents 
by Günther SEJKORA, Dr., R&I Manager at Luger Research | CEO of Items, Austria

CIRCULAR ECONOMY (p34)
Lighting for Good
by Nicolas MARTIN & Tiphaine TREINS, Lighting Manager at LVMH & Founder and Principal of Temeloy Advanced Lighting Design, France & UK

ECODESIGN AND ENERGY LABELLING (p38)
New Requirements for Energy Efficiency and Labelling of Lighting
by Fabian FLIGGE, Product Expert at TÜV SÜD, Germany

LIGHTING INDUSTRY SCENARIOS (p40)
Future Scenarios of the Lighting Industry: Towards a More Sustainable and Innovative Market
by Ganix LASA, Ph.D., Professor at the Mondragon University, Spain

LED STUDY (p46)
Full Spectrum LED Study 1.0
by Daniel NEVES PIMENTA, Arch. & Lisa-Marie WADLE, M.Sc., Project Engineer & Researcher at Fraunhofer IBP, Germany

AVERAGE SPECTRAL DIFFERENCE (p52)
Average Spectral Difference -- New Metric to Evaluate the Naturalness of Artificial Light Sources
by Brian CUMPSTON, Dr., VP of Solutions Development at Bridgelux, USA

SPECTRAL ENGINEERING (p58)
Facing the Challenges of Spectral Engineering with a New Software Tool
by Adrià HUGUET-FERRAN, Ph.D. Candidate at University of Barcelona | CTO at Kumux, Spain

THERMOGRAPHY OF LED MODULES (p64)
Transient Infrared Thermography for Thermal Conduction Path Analysis of LED Modules
by Peter W. NOLTE, Dr., Research Team Leader at Fraunhofer Application Center for Inorganic Phosphors, Germany

AUTOMOTIVE LIGHTING (p68)
Choosing the Right Inductor Technologies for Automotive LED Lighting
by Bill GISSELER, Senior Applications Engineer at TDK Corporation of America

LED LAMP MR16 (p72)
Combination of an Advanced Thermo-Transfer Technology and a Novel High Impact Light Source to Improve MR16 Products
by Bertrand OUELLET, Founder and Owner of LUBO Lighting, Canada

LIGHTING DESIGN I (p76)
The Poetics of Darkness
by Monica LLAMAS & Florencia CASTRO, both of MFA Lighting Design, B.A. of Architecture, USA

LIGHTING DESIGN II (p82)
Gaming in the Lighting Sector -- A Game Changer?
by Wolfgang BERNECKER, Founder and CEO of FutureACT, Austria

LpR80 | July/Aug 2020 

When Circular Economy Meets the Lighting Industry p 66
Ultraviolet Light for Disinfection and Sterilization p 82
Using Social Media Data in Modern Lighting Design p56

Editorial: Environment-related Lighting

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COMMENTARY (p8)
The Basic Sales Arguments for LED Lighting
by Donatas STOČŪNAS, Commerce Manager at ATKO

INTERNATIONAL LIGHTING NEWS (p10)

REGULATION NEWS (p21)

LPS DIGITAL (p22)
Designing with Dynamic Light Textures -- Enlightening Designers

INTERVIEW - REACTIVE OXYGEN SPECIES (p24)
Scott ZIMMERMAN, Founder and Chief Research Officier (CRO) of Silas, USA
compiled by Arno GRABHER-MEYER, LED professional

ATOMIC LAYER DEPOSITION (p32)
Atomic Layer Deposition -- Leading Thin Film Coating Technology for SSL
by Minna TOIVOLA, D.Sc.(Tech.), Marketing Manager at Picosun

HCL LED COMPONENTS | Advertorial (p38)
Optimized Light for Circadian Rhythm Synchronization Enhancing Indoor Lifestyle
by SAMSUNG Electronics

DEEP ULTRAVIOLET LEDS (p40)
The Key Technology of Deep Ultraviolet (DUV) LEDs and Its Application
by Junxi WANG, Dr., et al, Researcher at Institute of Semiconductors,
Chinese Academy of Sciences, Beijing, China 

TUNABLE WHITE TECHNOLOGY (p48)
Introduction of On-BBL Tunable White Technology
by Tomokazu NADA, Managing Director at ZIGEN Lighting Solutions

LIGHTING DESIGN & SOCIAL MEDIA (p56)
Ambient Lighting Design for Persuasive Environments Using Social Media Data
by Yasaman MAVVAJ, MSc., Product Designer at Koerner Design

CIRCULAR ECONOMY (p 66)
When Circular Economy Meets the Lighting Industry (LCA)
by Deidre WOLFF, MSc., Project Engineer at Catalonia Institute of Energy Research (IREC)

ECODESIGN & ENERGY LABELLING (p74)
EU's Ecodesign and Energy Labelling Regulations
by Axel BASCHNAGEL, MarCom Manager at LightingEurope

HORTICULTURAL LIGHTING (p76)
Specifying LED Colors for Horticultural Lighting
by Ian ASHDOWN, P.Eng.(Ret), FIES, President and Senior Scientist for SunTracker Technologies

DISINFECTION AND STERILIZATION (p82)
UV LEDs in Disinfection and Sterilization
by Norman BARDSLEY, Dr., Chief Analyst of the International Solid-State Lighting Alliance (ISA)

LIDAR TECHNOLOGY (p88)
Open Source LIDAR Prototyping Platform
by István COSOMORTÁNI et al, FPGA Design Engineer at Analog Devices

LpR79 | May/June 2020 

Are Micro-LEDs Taking Over p30
The Ultimate LED Phosphor Report p48
Are there Limits in Flexible Lighting Systems p70

Editorial: Future Proofed Lighting Systems

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COMMENTARY (p8)
Future-Proofing - An Illusion in Lighting?
by Daniel Neves PIMENTA, Architect & Researcher at Fraunhofer Institute for Building Physics

INTERNATIONAL LIGHTING NEWS (p10)

REGULATION NEWS (p27)

LPS DIGITAL - VIDEOS (p28)
Personal Table Light - Intelligent Workspace Lighting

TECH-TALKS BREGENZ - MICRO LEDS (p30)
Hani KANAAN, Smart Lighting Technologies Business Development at CEA-Leti, France
compiled by Arno GRABHER-MEYER and Dr. Günther SEJKORA, LED professional

COLOR STABILITY (p38)
Degradation of Green High-Power LEDs - Influence on Color Stability of Multi-Channel Luminaires
by Alexander HERZOG, MSc, Research Assistant at TU Darmstadt

UV Disinfection | Advertorial (p46)
Characterization of UV Sources for Disinfection
by GL OPTIC

LED PHOSPHOR TRENDS (p48)
Current Trends in LED Phosphor Developments
by Lin ZHANG, Dr., Chief Technology Officier at Beijing Nakamura Yuji Science and Technology

THERMAL DESIGN (p58)
Case Study: Thermal Analysis of an LED Design
by Arnaud GIRIN, Technical Marketing Specialist at SimScale

FUTURE PROOF SOLUTIONS (p62)
Cost Benefit of Future Proof Solutions
by Walter WERNER, Dr., Owner and CEO, Director at Werner Management Services

DC/DC CONVERTERS (p 66)
PCB Space-Constraint Woes Eliminated by 2 MHz Monolithic, Buck-Boost DC/DC Converter and LED Driver
by Kyle LAWRENCE, Application Engineer at Analog Devices

FLEXIBLE LIGHTING SYSTEMS (p70)
New Flexible Lighting Systems Based on Atmospheric Plasma Metallization
by Yaser HAJ-HMEIDI, Development Specialist at Lumitronix

LIGHTING CONTROLS (p74)
Lighting Controls - Futureproofing and Open Standards Lead the Way
by Pal KARLSEN, Senior Analyst in the Home, Building and City Technologies Group at OMDIA

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LpR78 | March/April 2020 

Unified Glare Rating p 30
Photobiomodulation p 34
The Perfect Light p 48

Editorial: Individualization of Connected Lighting

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COMMENTARY (p8)
Why Comfortable Lighting Needs New Quality Parameters
by Kenneth MARTIN, Dipl.-Ing.(FH), Light Source Specialist at Zumtobel Group

INTERNATIONAL LIGHTING NEWS (p10)

REGULATION NEWS (p29)

UNIFIED GLARE RATING (p 30)
Discomfort Caused by Glare from Luminaires with a Non-Uniform Source Luminance
by Peter THORNS BSc(Hons), CEng, FCIBSE, FSLL, Head of Strategic Lighting Applications and Global Lighting Applications at Zumtobel Group

TECH-TALKS BREGENZ Photobiomodulation (p 34)
Jürgen HONOLD, Program Director at Seaborough Life Sciences, The Netherlands
compiled by Arno GRABHER-MEYER, LED professional

FLICKER DIRECTIVE (p 42)
New Directive in Europe: Flicker of LED Lighting
by Peter ERWIN, CEO and Design Engineer at Der Lichtpeter

THE PERFECT LIGHT (p 48)
In Search of the Perfect Light
by Stephen MASON, Dr., Managing Director at Sustainable Eye Health

TUNABLE SPECTRUM (p 54)
A New Method to Tune an LED Spectrum
by Daniel HAN, Business Development Director at Beijing Yuji International

CIRCADIAN ENTRAINMENT (p 60)
LED Lighting for Circadian Entrainment
by Bill CHAN, M.Sc., President of LiteController

LED TECH IMPLEMENTATION (p 64)
How to Implement the Latest LED Technology for a Successful Application
by Marc JUAREZ, Technical Director Europe of Seoul Semiconductor

ADVERTORIAL | Measurement Devices (p 68)
Integrated Solution for Human Centric Lighting (HCL) / Integrative Lighting Assessment
by Gigahertz-Optik

THERMAL MEASUREMENT (p 70)
Challenges for Measuring Multichip LED Light Engines for Interior Lighting Applications
by Mete MUSLU, MSc, Research Assistant at Ozyegin University

DRIVER EFFICIENCY (p 76)
How to Increase the Efficiency of Two-Stage Drivers
by Dr. Michael WEIRICH, Senior Manager Application Engineering at Infineon Technologies

TRACK-LIGHT DRIVER (p 80)
Designing an Invisible Driver for High-End Track Lights
by Mickey MADSEN, Dr., CEO of Nordic Power Converters

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LpR77 | Jan/Feb 2020

Challenging EcoDesign p28
Awarded HCL LEDs p40
User-Centric Luminaries p62

Editorial: Light for the Third Industrial Revolution

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COMMENTARY (p8)
Paradigm Changes in Lighting
by Fabien Bubendorff, MSc, Dipl. Eng., CEO of Origin Services

INTERNATIONAL LIGHTING NEWS (p10)

REGULATION NEWS (p27)

ECODESIGN REQUIREMENTS (p28)
Limits for Flicker and Stroboscopic Effects
by Dr. Günther Sejkora, Research & Innovation Manager at Luger Research e.U.

TECH-TALKS BREGENZ (p32)
32 Dr. Christoph Wächter, Senior Scientist at Fraunhofer IOF, Germany
compiled by Guenther Sejkora, LED professional

HCL LEDs (p40)
LED Innovations for the Improvement of HCL Luminaires
by Menno SCHAKEL, Technical Marketing Engineer at Nichia

LED MANUFACTURING (p46)
Volume Manufacturing of Mini and Micro LEDs
by Sean Kupcow, Senior R&D Engineer at Rohinni LLC

OPTICAL FILMS (p52)
FF-MOEs — The Potential of Tailor-made Light-directing Structures on Film for Enabling New Design Possibilities for Luminaires
by Dr. Claude LEINER, Key Researcher at Joanneum Research

3D PRINTING (p56)
New Disruptive Fabrication Technologies for a Novel Design Approach by Enrico Cozzoni, PhD, Senior Scientist and Aerospace Engineer at Grado Zero Espace

LUMINARY OF THE FUTURE (p62)
User-centered Design Approach to Develop the Luminary of the Future
by Ganix Lasa, PhD, Researcher at Mondragon University

VOICE CONTROLLER (p68)
Offline Lighting Voice Controller — An Alternative to Voice Assistants
by Cezary Skotak, Owner and CEO of CEZOS, Poland

SMART CONNECTOR (p72)
Smart Connector — A New Solution for Smart Lighting
by Ing. Rainer Reiter & Dr. Hugo Pristauz, CEO and CTO at Bluenetics

PERSONALIZED WORKPLACES (p78)
Benefits of Personalized Workplaces Solution
by Toni Anttila & Mirva Saarijärvi, Head of Workspaces at Ensto, Head of Marketing & Communication

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LpR76 | Nov/Dec 2019 

Tech-Talks Bregenz: Ruairí O'Brien
Research: Freeform Micro-Optics
Technologies: Tuneable White & Smart Lighting
Special Topic: Peripheral Discomfort Glare

Editorial: Experience the Future of Lighting

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COMMENTARY
Personal Lighting Profiles Might Be the Key to Creating a Natural "Work Light Balance"
by Henrik Clausen, Fagerhult Lighting Academy   (p 08)

TECH-TALKS BREGENZ
Ruairí O'Brien, Founder of Ruairí O'Brien Lighting Design
compiled by Dr. Guenther Sejkora, LED professional    (p 30)

RESEARCH
Micro-Optics for Efficient LED Spotlights with Arbitrary Farfield Distributions
by Dr. P. Schreiber and Dr. Ch. Waechter et al., Fraunhofer IOF    (p 40)

EVENTS
Spread Spectrum Frequency Modulation Reduces EMI
by Arno Grabher-Meyer, LED professional    (p 48)

TECHNOLOGIES
A White Light Tuning Strategy that Fuels HCL
by Wouter Soer, Lumileds    (p 68)

A New LED Controller Technology to Expedite the Next Level of Smart Lighting
by Kurt Marquardt, Infineon Technologies (p 74)

Fluorescence-Free Radiant Flux Measurement of UV LEDs
by M. Clark, R. Zuber & M. Ribnitzky, Gigahertz-Optik (p 78)

REGULATIONS
New Ecodesign Regulation on Flicker and Stroboscopic Effect in LED Lighting
by M. Przybyla & P. Czarnecki, GL Optic    (p 82)

SPECIAL TOPICS
Measure Influence of Discomfort Glare on Task Performance Using the Stroop Task to Circumvent Participant Assessments
by Mads Mårbjerg, Buro Happold Engineering Berlin    (p 86)

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LpR75 | Sept/Oct 2019

Tech-Talks Bregenz: Wilfried Kramb
Research: IR Thermography & Micro Optics
Technologies: EMI Reduction & Thin LED Modules
Special Topics: Circular Economy

Editorial: 75^th Issue Jubilee

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COMMENTARY
Providing Better Light Should Still be the Focus of the SSL Industry
by J. Norman Bardsley, PhD, Bardsley Consulting (p 08)

TECH-TALKS BREGENZ
Wilfried Kramb, Interior & Lighting Designer, a∙g Licht
compiled by Dr. Guenther Sejkora, LED professional (p 32)

RESEARCH
Temperature Profiling of Secondary LED Optics by Infrared Thermography
by Peter W. Nolte et al., South Westphalia University of Applied Sciences,
Fraunhofer Application Center for Inorganic Phosphors & TRILUX (p 38)

On Life Cycle Assessment to Quantify the Environmental Impact of Lighting Products
by V. Ferreira, D. Wolff, & C. Corchero,Catalonia Institute for Energy Research (IREC) (p 44)

Design and Tolerancing of Freeform Microlens Arrays for Solid-State Lighting
by Oscar Fernándezet al., CSEM (p 58)

TECHNOLOGIES
Spread Spectrum Frequency Modulation Reduces EMI
by Greg Zimmer & Kevin Scott, Analog Devices (p 64)

12 Years of Progress in Manufacturing White LEDs
by Rob Alferink, PicusLED & Arno Grabher-Meyer, LED professional (p 70)

APPLICATIONS
Inspiration from a Parallel Universe: Reviving the Vision of OLED
by Matt Hanbury, Lightly Technologies (p 76)

Lighting the Way to Greater Well-Being
by Makoto Ogawara & Giovanni Vecchio, Nichia (p 82)

SPECIAL TOPICS
The Adverse Ecological Impacts of Light Pollution: LEDs' Role in Mitigation
by Dr. C. J. Macgregor & Dr. D. M. Evans, University of York & Newcastle University (p 86)

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LpR74 | July/Aug 2019

Tech-Talks Bregenz: David Schmidmayr
Research: Visual Light Communication & Surgical Light
Technologies: Machine Vision & Optical Materials for UV
Special Topics: Horticulture Lighting

Editorial: Quality of Light

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COMMENTARY
Selecting the UV LED Wavelength for Purification Applications
by Patrick Durand, Future Lighting Solutions (p 08)

TECH-TALKS BREGENZ
David Schmidmayr, CEO, SANlight Research
compiled by Dr. Guenther Sejkora, LED professional (p 24)

RESEARCH
Lighting System Based on Visible Light Communications
by René Grabher & Guido Piai, Interstate University of Applied Sciences NTB (p 32)

Tissue-Specific & Biodynamic Control of Surgical Lights - a Future Lighting Concept
by Prof.Dr.Dipl-Phys. P. Belloni & A. Gaertner, University Furtwangen (p 40)

EVENTS
The Trend Towards Improved Light Quality Continues at LFI
by Arno Grabher-Meyer, LED professional (p 46)

TECHNOLOGIES
LED Driver for High Power Machine Vision Flash
by Keith Szolusha & Kyle Lawrence, Analog Devices (p 62)

Transparent Material Considerations for UV Optics in Horticultural Lighting Applications
by Justine Galbraith & Sharayah Follett, Kopp Glass (p 66)

APPLICATIONS
Growing Crops Under the Best Possible Conditions
by A. Kok, B. Van Zaal, Smart Greenhouses, B. Meulblok, Ophir (p 72)

Combining Sunlight and LED Grow Lights for Ultimate Plant Growth
by Luis Rivera, Advanced LED Lights (p 80)

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LpR73 | May/June 2019


Tech-Talks Bregenz: Julian Carey
Research: LEDs for Harsh Environments
Research: Measurement of Tj
Special Topic: LiFi & AI

Editorial: Future Lighting

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COMMENTARY
Care, Caution & Awareness Are Needed When Using LED Lights
by Kyra Xavia, Light and Lighting Research Consortium (p 08)

ORGANIZATION INSIGHTS:
Horticultural Lighting - The Root to International Standards
CIE, Division 6 (p 30)

Zhaga-D4i Certification Signals Plug-and-Play Interoperability
Zhaga and DiiA (p 32)

TECH-TALKS BREGENZ
Julian Carey, Product & Technical Marketing Mganager at SLD Laser
compiled by Dr. Guenther Sejkora, LED professional (p 34)

RESEARCH
Hermetic Polymer-Free White LEDs for Harsh Environments
by Dr. Michael Kunzer et al., Fraunhofer Institute for Applied Solid State Physics (p 42)

New Approach for Accurate and Fast Measurement of LEDs Tj
by Prof. Mehmet Arik et al., EVATEG / Ozyegin University (p 48)

SPECIAL TOPIC
LiFi as a Paradigm-Shifting 5G Technology
by Prof. Harald Haas, University of Edinburgh (p 54)

AI & Lighting
by Henri Juslén, Omar Nasir &Javad Nouri, Helvar (p 62)

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LpR72 | Mar/Apr 2019

Tech-Talks Bregenz: Scott Wade
Research: Freeform Microlens Arrays
Technologies: Smart Buildings DC Grids
Applications: Office Lighting Controls

Editorial: Connected Miniaturized Lighting

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COMMENTARY
What the Heck is Future-Proof?
by Arno Grabher-Meyer, LED professional (p 08)

ORGANIZATION NEWS: Zhaga & Zigbee Alliance (p 28 & 30)

TECH-TALKS BREGENZ
Dr. Scott Wade, Technical & Certification Manager, DiiA
compiled by Dr. Guenther Sejkora, LED professional (p 34)

RESEARCH
Semi-Empirical Characterization of Freeform Microlens Arrays
by Oscar Fernández et al., CSEM & ANSYS (p 42)

Thermal and Optical Challenges for SSL in Automotive Applications
by Umut Zeynep Uras et al., Ozyegin University & FARBA Corp. (p 50)

TECHNOLOGIES
LED Lighting Systems in Smart Buildings with DC Microgrids
by Carsten Moellers, Abalights (p 60)

APPLICATIONS
Technologies for Shared Office Space
by Matthias Kassner, EnOcean GmbH (p 66)

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LpR71 | Jan/Feb 2019  

Tech-Talks Bregenz: Octavio Perez
Research: Medical & Human Centric Lighting
Technologies: Voice Control & Advanced LEDs
Special Topics: Healthy Light & Blue Light Issues

Editorial: Triggering Innovation

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COMMENTARY
Well-Being, Light and Exhibition Lighting
by Prof. Dario Camuffo, Polytechnic of Milan & Tech. Committee for Cultural Heritage    (p 08)

CIE RESEARCH ACTIVITIES (p 28)

ORGANIZATION NEWS: LightingEurope    (p 30)

TECH-TALKS BREGENZ
Dr. Octavio Perez, Adjunctant Researcher, Mt. Sinai Hospital
compiled by Dr. Guenther Sejkora, LED professional    (p 32)

RESEARCH
Implications for Human-Centric Lighting Design in Tropical Nursing Homes: A Pilot Study
by Dr. Szu-Cheng Chien, Singapore Institute of Technology    (p 40)

Flex LED Based Smart Light System for Healing of Chronic Wounds
by David Kallweit, CSEM    (p 48)

TECHNOLOGIES
Voice Controlled Lighting that Protects Privacy and Data
by Genia Shipova, Snips    (p 54)

Circadian-Friendly Light Emitters: From CCT-Tuning to Blue-Free Technology
by Aurelien David, Soraa    (p 58)

Technical Progress Improves Efficacy of Green LEDs by 40%
by Dr. J.-P. Ahl & Dr. A. Bauer, Osram Opto Semiconductors    (p 64)

SPECIAL TOPICS
Healthy Light - LED Technology for Health and Care Applications
by Peter Haumer, Lumitech/Kiteo    (p 68)

Melanopic Green - The Other Side of Blue
by P. Eng. (Ret.) Ian Ashdown, SunTracker Technologies    (p 74)

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LpR70 | Nov/Dec 2018  

Tech-Talks Bregenz: Dr. Maja Grubisic
Research: Wellness & Performance, Light Pollution
Technology : DC Grids, Smart Lighting & IoT
Applications: LEDs for Horticulture Lighting

Editorial: Lighting Trends

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COMMENTARY
An Industry at a Crossroads
by Arno Grabher-Meyer, LED professional    (p 08)

CIE RESEARCH ACTIVITIES (p 28)

TECH-TALKS BREGENZ
Dr. Maja Grubisic, Researcher, Free University Berlin & Leibniz-Institute
compiled by Dr. Guenther Sejkora, LED professional    (p 30)

RESEARCH
Lighting and Emergency Department Clinician Wellness and Performance Improvement
by Octavio L. Perez, Ph.D, Mount Sinai Hospital    (p 38)

Hazard or Hope? LEDs and Wildlife
by Prof. Travis Longcore, University of Southern California / School of Architecture    (p 52)

When Nights Are No Longer Dark: Effects of Artificial Light at Night on Agroecosystems
by Dr. Maja Grubisic, Leibniz-Institute & Free University Berlin    (p 58)

RESEARCH REPORTS
User Evaluation of the OpenAIS Pilot Installation
by Thomas van de Werff et al., Eindhoven University of Technology    (p 64)

EVENTS
LpS & TiL 2018 - An Industry Is Repositioning Itself
by Arno Grabher-Meyer, LED professional    (p 72)

TECHNOLOGIES
Standardized Programming of Lighting Components Using NFC Technology
by Arnulf Rupp, MD-SIG    (p 88)

Bluetooth Mesh Protocol as Applied to Lighting
by Russ Sharer, Fulham    (p 92)

APPLICATIONS
Enriching Horticultural Lighting for Faster Growth and Better Crops
by Dr. Richard Blakey, Würth Elektronik eiSos    (p 98)

SPECIAL TOPIC
48 VDC Integrated Drivers Offer New Options
by R. Weber & S. Hamilton, TE Connectivity    (p 102)

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LpR69 | Sept/Oct 2018  

Tech-Talks Bregenz: Guido van Tartwijk
Research: Micro-Optics & Medical Devices
Engineering & Technology: Data, Optics, IoT & Cooling
Events: LpS & TiL Planning and Program

Editorial: LpS / TiL 2018 - The Lighting Events

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COMMENTARY
A New Lighting Scene
by Rogier van der Heide, Curator of Trends in Lighting 2018    (p 08)

EVENTS
Planning Your LpS 2018 Is Easy with Our Simple Program Chart and Event App
by Bronwen Rolls, Trends in Lighting    (p 34)
LpS&TiL 2018 EVENT PROGRAM    (p 36)

CIE RESEARCH ACTIVITIES (p 40)

ORGANIZATIONS SPECIAL (p 42)
Zhaga Enables Mechanical IoT-Upgradability for Outdoor LED Lighting Fixtures
by Dee Denteneer, Zhaga    (p 42)

Evaluating Performance of LED based Luminaires
by Various Experts from LightingEurope    (p 48)

TECH-TALKS BREGENZ
Guido van Tartwijk, CEO of Tridonic
compiled by Dr. Guenther Sejkora, LED professional    (p 56)

RESEARCH
Smart Design of Freeform Micro-Optical Elements for Thin Direct-Lit Luminaires
by Christian Sommer et al., Joanneum Research Forschungsgesellschaft    (p 64)

Optical Designs to Improve LED Lighting Efficiency of Medical Endoscopes
by Alexander Gaertner & Paola Belloni, University Furtwangen    (p 70)

ENGINEERING
Rethinking the Photometric Data File Format
by P. Eng. (Ret ) Ian Ashdown, SunTracker Technologies    (p 76)

Additive Optics Design and Fabrication for Smart Lighting Systems and Tailored Project Solutions
by Marco de Visser et al., Luximprint & Physionary    (p 82)

TECHNOLOGY
Qualified Bluetooth Mesh – Making Lighting Controls Future-Proof
by Patrick Durand, Future Lighting Solutions    (p 88)

Materials, Manufacturing and Technologies for Designing Passive Cooling Devices
by John Broadbent, Columbia-Staver    (p 94)

APPLICATIONS
Interactive Lighting Control is Opening New Doors for LED Application
by Manjinder Benning, Limbic Media    (p 98)

TRENDS
Approaching the Spectrum of the Sun
by Marc Juarez, Seoul Semiconductor    (p 104)

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LpR68 | July/Aug 2018  

Tech-Talks Bregenz: Rico Kramer
Research: Aerosol Jet Printing, Laser Lighting
Technology & Application: Horticulture, Office Lighting
Special Topic: IoT - Economy & Ecology

Editorial: Smart Electronics & Components

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COMMENTARY
UV-Light for Plant Development
by Marvin Boell, TUV SUD Asia Pacific    (p 08)

CIE RESEARCH ACTIVITIES (p 24)

ZHAGA SPECIAL (p 26)

EVENTS
LpS Aims to Prepare Its Delegates for the Digital Future
by Siegfried Luger, LED professional    (p 28)

TECH-TALKS BREGENZ
Rico Kramer, Inventor, esave ag
compiled by Dr. Guenther Sejkora, LED professional    (p 30)

RESEARCH
A Study on Aerosol Jet Printing in LED Module Manufacturing
by Dr. Paul Hartmann et al., Joanneum Research Forschungsgesellschaft    (p 38)

Laser Technology for Lighting Applications: A Review and Analysis of a Promising Technology
by Nicola Trivellin et al., University of Padova    (p 44)

RESEARCH REPORTS
Challenges of the Integration of Lighting Systems and Components in IoT
by B. Pronk & S. Verbrugh, Signify & OpenAIS    (p 50)

TECHNOLOGIES
UV LED Technology for Emerging Applications in Agriculture
by Terrance Berland, Violet Defense Group    (p 56)

APPLICATIONS
Smart Lighting and HCL in Office Applications
by Timo Pakkala, Casambi    (p 62)

SPECIAL TOPIC
Intelligent Lighting - A Case of Diminishing Returns?
by Matthias Kassner, EnOcean    (p 68)

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LpR67 | May/June 2018  

Tech-Talks Bregenz: Ken Munro
Research: Thermal Testing, Production
Manufacturing & Technology: Micro-Plants & IoT
Application: Aerospace Exterior Lights

Editorial: L+B 2018 -
Connectivity & Services

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COMMENTARY
Blue Light Hazard - How Dangerous is SSL Lighting?
by Dr. Thomas Attenberger, Instrument Systems    (p 08)

CIE RESEARCH ACTIVITIES (p 34)

TECH-TALKS BREGENZ
Ken Munro, Partner & Founder, Pen Test Partners
compiled by Dr. Guenther Sejkora, LED professional    (p 36)

RESEARCH
Automatic Panel Level Transient Thermal Tester
by Prof. Gordon Elger et al., Technische Hochschule Ingolstadt    (p 44)

Roll-to-Roll UV Nanoimprint Lithography for Large-Area Nano- and  Micro-Structuring of Flexible Substrates
by Dr. Paul Hartmann et al., Joanneum Research Forschungsgesellschaft m.b.H    (p 50)

A New Approach for Manufacturing LED Advertising Boards Backlighting
by Dr. Eveliina Juntunent al., VTT Technical Research Centre of Finland    (p 56)

EVENTS
Lighting Industry Quo Vadis - Impressions from Light + Building 2018
by Arno Grabher-Meyer, LED professional    (p 62)

MANUFACTURING
A Manufacturing Revolution for the LED Lighting Industry
by Paavo Käkelä, EID Tech    (p 76)

TECHNOLOGIES
Integrating Lighting in the Internet of Things
by B. Pronk & F. van Tuijl, Philips Lighting Research & Philips Lighting    (p 80)

LED Lighting Requires New Approaches in Optics
by Marek Škereň, IQ Structures    (p 88)

AERONAUTICS
Abrasion in Transparent Lens Materials for Exterior Aircraft Lighting
by Adam Willsey, Kopp Glass    (p 92)

LpR66 | March/April 2018  

Tech-Talks Bregenz: Fred Maxik
Research: Lifetime Simulation & Optimization
Technologies: LED Overvoltage, LED Drivers
Application: Thermal Management

Editorial: An IP SnapShot
Into Lighting

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COMMENTARY
On Smart Luminaires
by Prof. Tran Quoc Khanh, Technical University Darmstadt    (p 08)

CIE RESEARCH ACTIVITIES (p 32)

TECH-TALKS BREGENZ
Fred Maxik, Founder & CTO, Lighting Science Group
compiled by Dr. Guenther Sejkora, LED professional    (p 34)

RESEARCH
Lifetime- and Economic Efficiency Simulation of LED Luminaires in Dymola/Modelica
by S. Haemmerle & T. Schmitt, University of Applied Sciences Vorarlberg    (p 40)

Full-Color InGaN/AlGaN Nanowire LEDs for SSL and Displays
by M. R. Philip & Dr. H. P. Nguyen, New Jersey Institute of Technology    (p 50)

EVENTS
Technology Is the Answer, But What Was the Question?
by Arno Grabher-Meyer, LED professional    (p 56)

TECHNOLOGIES
A Near Infrared Enhanced LED Lighting Approach
by Scott Zimmerman, Silas    (p 62)

ENGINEERING
Electrical Over Stress - How to Prevent an LED Failing Earlier than Expected
by Mauro Ceresa, Cree    (p 70)

Method and Circuit to Maintain Constant Light Output for LED Luminaires
by Prof.Dr.Eng. Stelian Matei, Electromagnetica    (p 80)

LpR 65 | Jan/Feb 2018

TTB: Julia Frohleiks
Research: Freeform Optics Optimization
Technologies: Multi-Pixel LED Technology
Engineering: Thermal Management

Editorial: Smart World

 

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COMMENTARY
Can You Show Me the Next S-Curve, Please?
by Dr. Guenther Sejkora, LED professional    (p 08)

CIE RESEARCH ACTIVITIES (p 30)

TECH-TALKS BREGENZ
Julia Frohleiks, Researcher, University of Duisburg-Essen
compiled by Dr. Guenther Sejkora, LED professional    (p 34)

RESEARCH
Optimization of Freeform Optics Using T-Splines in LED Illumination Design
by Annie Shalom Isaac et al., Karlsruhe Institute of Technology    (p 38)

Repro-Light - Looking for a Sustainable and Modular Luminaire Architecture
compiled by Arno Grabher-Meyer, LED professional    (p 44)

TECHNOLOGIES
Multi-Pixel LED Technology Opens New Horizons for Smart Lighting Applications
by R. Bertram & N. Harendt, Osram Opto Semiconductors    (p 48)

ENGINEERING
Thermal Simulation Tool for LED Design Requirements
by Chris Aldham, 6SigmaET    (p 54)

AUTOMOTIVE
Flicker-Free Control of Individual LEDs in Matrix Headlights
by Keith Szolusha, Linear Technology/Analog Devices    (p 58)

LpR 64 | Nov/Dec 2017 

TTB: Dr. Ken T. Shimizu
Research: Hybrid Quantum Dot LECs
Environment & Quality: Energy Saving & Glare
Events: LpS Post Show Report

Editorial: Five Lighting Trends

 

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COMMENTARY
The Value Of High-End Labs for High Quality Lighting
by Klaus Ludwig, Osram    (p 08)

CIE RESEARCH ACTIVITIES (p 32)

TECH-TALKS BREGENZ
Ken T. Shimizu, Research & Development Director at Lumileds
compiled by Arno Grabher-Meyer, LED professional    (p 34)

RESEARCH
Hybrid Quantum Dot Light Emitting Electrochemical Cells
by Dr. Ekaterina Nannen et al., Nano-Energie-Technik-Zentrum (NETZ) / Uni DuE    (p 40)

Thermal Issues Posed by Compact Packaging and IoT for Next Generation SSL
by Mehmet Arik & Umut Zeynep Uras, EVATEG / Ozyegin University    (p 44)

EVENTS
LpS Gets a Younger Sibling to Foster a Holistic System Approach
by Arno Grabher-Meyer, LED professional    (p 52)

TECHNOLOGIES
LiFi - What It Is, How It Works, What It Provides, How to Apply, and Its Future Prospects
by Luc Chassage, Oledcomm & Versailles University    (p 66)

A New Technology Is Changing the Tunable White Solutions
by Phil Lee, Meteor Lighting    (p 70)

QUALITY
Glare Reduction Made Easy
by Dr. Claudius Noack, NORKA Leuchten    (p 74)

ENVIRONMENT
A World of LED Lights - The Cost of Waiting
by Benoit Bataillou, Pi Lighting    (p 78)

LpR 63 | Sept/Oct 2017 

TTB: Dr. Wilfried Pohl
Research: Spectral Rayfiles & Medical Applications
Characterization & Quality: UV & Shop Lighting
Technologies: Laser & Quantum Dots

Editorial: The Lighting Events

 

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COMMENTARY
Brave New World and the New Dualism of Light(ing)
by Arno Grabher-Meyer, LED professional    (p 08)

CIE RESEARCH ACTIVITIES (p 36)

TECH-TALKS BREGENZ
Tech-Talks BREGENZ Dr. Wilfried Pohl, Director of Research at Bartenbach GmbH
compiled by Dr. Guenther Sejkora, LED professional    (p 38)

RESEARCH
Measurement of Angular and Spatial Resolved Spectral Rayfiles
by I. Rotscholl et al., Karlsruhe Institute of Technology    (p 48)

Challenges when Designing LED-Based Illumination Systems in Medical Applications and Diagnostics
by Prof. Paola Belloni & Alexander Gärtner, Furtwangen University    (p 58)

TECHNOLOGIES
Intelligent Lighting Designs Enabled by Laser Light
by J. A. Carey & Dr. Paul Rudy, Soraa Lasers    (p 66)

Quantum Dot Based White LEDs for General Illumination
by Ken T. Shimizu et al., Lumileds    (p 72)

CHARACTERIZATION
Challenges in UV Measurement
by Dr. Tobias Roesener, Instrument Systems    (p 80)

QUALITY
Lighting to Achieve Optimal Appearance
by Markus Reisinger, Lighting Research Studio    (p 88)

TRENDS
Trends in Horticulture Lighting - Interview with Paul Scheidt
compiled by Siegfried Luger & Bronwen Rolls, LED professional    (p 92)

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LpR 62 | July/Aug 2017 

TTB: Jamie Singerman
Research: AlGaN/GaN-on-Si FET Drivers
Technologies: High Frequency LED Drivers
Applications: Interior Automotive Lighting

Editorial: LaaS

 

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COMMENTARY
Lighting Delivering Increased Value to Society - A Strategy for Growth
by Peter Hunt, Lighting Industry Association (p 08)

CIE RESEARCH ACTIVITIES (p 24)

TECH-TALKS BREGENZ
Tech-Talks BREGENZ - Jamie Singerman, Worldwide Corporate Vice President at FLS
compiled by Siegfried Luger, LED professional    (p 26)

RESEARCH
LED-Retrofit Based on AlGaN/GaN-on-Si Field-Effect Transistor Drivers
by Andreas Zibold et al., Fraunhofer Institute for Applied Solid State Physics IAF    (p 32)

TECHNOLOGIES
LED Driver Miniaturization - Opening New Opportunities for Solid State Lighting
by Mickey Madsen, Nordic Power Converters    (p 36)

SoC Technologies in Lighting - Today’s Landscape and Tomorrow's Practices
by P. Winiarczyk & S. Rzadkosz, Silvair    (p 42)

QUALITY
Avoiding Brightness and Color Mismatch with Proper RGB Gamut Calibration
by Rood Bouten, Admesy    (p 46)

APPLICATION
Interior Automotive Lighting Control Redefined
by Roland Neumann, Inova Semiconductors    (p 52)

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LpR 61 | May/June 2017 

Interview: Dipl.-Jur. Philipp Henrici
Research: Variability in LED Production
Research: Thin-Film Optics & Wafer Level Packaging
Applications: Tunnel Lighting

Editorial: Mega Trends

 

 

COMMENTARY
A Lighting Designers Relativity of Light Performance
by Dr. Sven Horsmann, luxlumina (p 08)

CIE RESEARCH ACTIVITIES (p 32)

TECH-TALKS BREGENZ
Tech-Talks BREGENZ - Philipp Henrici, President & Managing Director at BJB
compiled by Dr. Günther Sejkora, LED professional (p 34)

RESEARCH
New Glass-Based Phosphors for White Light-Emitting Diodes
by Franziska Steudel et al., Fraunhofer Institute (p 42)

Ultrathin Direct-Lit LED Module with Beam Shaping Thin-Film Optics
by Oscar Fernández et al., CSEM (p 48)

Smart LED System in Package through Water Level Integration Approach
by Z. Kolahdouz et al, Delft University of Technology (p 56)

Variability in LED Production and the Impact on Performance
by B. Bataillou & T. Merelle, Pi Lighting (p 62)

APPLICATION
Technology Challenges in Professional Tunnel Lighting Applications
by Maximilian Herzig, Swareflex (p 66)

Enabling Total Control in the Next Generation of Outdoor Lighting
by R. Weber & B. Nelson, TE Connectivity (p 70)

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LpR 60 | Mar/Apr 2017 

> TTB: Dr. J. Norman Bardsley   
> Research: Roadway Lighting & Perovskite Nanocrystals
> Technologies: Thermal Management & Smart Lighting
> Applications: SSL Horticulture & Animal Farming

 

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COMMENTARY
From Component to System
by Andreas Weisl, Seoul Semiconductor    (p 08)

CIE RESEARCH ACTIVITIES    (p 30)

TECH-TALKS BREGENZ
Tech-Talks BREGENZ - Norman Bardsley, President of Bardsley Consulting
compiled by Arno Grabher-Meyer, LED professional    (p 32)

RESEARCH
Roadway Lighting Optics for Environment Adaptive Spatial Light Distribution
by Viktor Zsellér & Dr. Krisztián Samu, Budapest Univ. of Technology & Economics    (p 40)

Lead Halide Perovskite Nanocrystals - A New Promise for Light Emitting Devices
by Mirko Prato & Francesco Di Stasio, Istituto Italiano di Tecnologia    (p 46)

TECHNOLOGIES
A Standardized Open Platform Is Key to the Future of Smart Lighting System Design
by Dr. Kyeongik Min, Samsung Electronics    (p 54)

Looking for the Best Thermal Solution for CSP Module Designs
by Dr. Giles Humpston, Cambridge Nanotherm    (p 60)

APPLICATION
Bio-Effective Lighting for Humans, Livestock and Plants
by Volker Neu, Vossloh-Schwabe Lighting Solutions    (p 64)

SSL Growth Strategies and USDA Corn Breeding Objectives
by Brandon Newkirk, LumiGrow    (p 68)

 

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LpR 59 | Jan/Feb 2017 

> Research: Lifetime Calculation
> Events: LuxLive & Swiss Photonics
> Technology & Application: Microscopy & Cave Lighting
> Usability: User Interface UI & UX

 

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COMMENTARY
Lighting Up Smart Cities
by Dr. Wu Chou, Huawei    (p 08)

CIE RESEARCH ACTIVITIES    (p 24)

TECH-TALKS BREGENZ
Dr. Rubén D. Costa, Group Leader, University of Erlangen-Nuremberg
compiled by Dr. Günther Sejkora, LED professional    (p 28)

RESEARCH
Lifetime Calculation of White HP-LEDs from 16,000 Hours Aging Data
by Max Wagner et al., TU Darmstadt    (p 34)

EVENTS
LuxLive and SILE Sharpen Focus on End-Users
by Arno Grabher-Meyer, LED professional    (p 40)

Swiss Photonics Workshop on Intelligent Efficient Solid State Lighting
by Arno Grabher-Meyer, LED professional    (p 44)

TECHNOLOGIES
Thermal Management of an LED Light Source for Microscopes
by Wolfgang Plank & Gerd Harder, ESCATEC    (p 50)

USABILITY
Enhancing the LED Experience - UI & UX as Success Factors for IoT Based Lighting Controls
by Karl Jónsson & Christian Moormann, Tridonic    (p 54)

APPLICATION
Technical Aspects Regarding the Equipment of Show Caves with Modern LED Systems
by Vladimir Vashkevich, Cave Lighting CL GmbH & Co KG    (p 58)

ARTICLE INDEX 2016    (p 68) 

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LpR 58 | Nov/Dec 2016 

> Research: Hybrid LEDs
> Events: Highlights from LpS 2016
> Technologies: Structured Glass & Dielectric Materials
> Innovation: On-Chip Beam Forming Optics

 

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Commentary
Review of the LED Lighting Design Approach
by Justin Jiang, UniBrite Technology    (p 08)

Tech-Talks Bregenz
Prof. Christian Cajochen, Univ. Basel, Head of Center of Chronobiology
compiled by Dr. Günther Sejkora, LED professional    (p 26)

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LpR 57 | Sept/Oct 2016 

> Research:Sky Radiance Distribution Pattern
> Engineering: Design Process & Online Tools
> Technologies: Full Spectrum LED
> Environment: Botanical Light Pollution

 

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Commentary
The Good the Bad and the Ugly
by Ruairí O’Brien, Federation of International Lighting Designers    (p 08)

Tech-Talks Bregenz
Sebastian Huelck, Director Lighting, EBV Elektronik
compiled by Dr. Günther Sejkora, LED professional    (p 32)

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LpR 56 | July/Aug 2016 

> Research: Lamp Quality & Flicker
> Tech-Talks BREGENZ: Francis Wong
> Application: Medical Fiber Optics Light Sources
> Reliability: E-Caps & Optocouplers in LED Drivers

 

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Commentary
Lifetime And Reliability
by Dr. Günther Sejkora, items & LED professional    (p 08)

Tech-Talks Bregenz
Francis Wong, Associate VP Lighting Business Unit, Lextar
compiled by Dr. Günther Sejkora, LED professional    (p 34)

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LpR 55 | May/June 2016 

> Research: Luminescent Glasses
> Manufacturing: Potting Processes for LED Modules
> Technology: Optimization of Thermal Management
> Tech-Talks BREGENZ: Dr. Biing-Jye Lee

 

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Commentary
LFI 2016 Touts LED Lighting and Digital Control Technology Transformation
by Dr. Nisa Khan, President of IEM LED Lighting Technologies    (p 08)

Tech-Talks Bregenz
Dr. Biing-Jye Lee, Chairman of Epistar
compiled by Siegfried Luger, LED professional    (p 30)

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LpR 54 | Mar/Apr 2016 

> Research: Thin-Film Optics
> Connected Lighting: PoE & BLE with iBeacons
> Technology: RGBW Dimming
> Tech-Talks BREGENZ: Karl Jónsson

 

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Commentary
ZHAGA Meets Smart Lighting
by Dee Denteneer, Secretary General of the Zhaga Consortium (p 08)

Tech-Talks Bregenz
Karl Jónsson, IoT Architect, Tridonic
compiled by Arno Grabher-Meyer, LED professional (p 38)

 

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LpR 53 | Jan/Feb 2016 

> Research: Hybrid LEDs
> Trends: Embedded Lighting
> Technology: Light Flicker
> Tech-Talks BREGENZ: Wolfgang Nemitz

 

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Commentary
Design Beyond FFF
by Ed van den Kieboom, InnovationFab Events    (p 08)

Tech-Talks Bregenz
Wolfgang Nemitz, Scientist, Joanneum Research
compiled by S. Luger, LED professional    (p 24)

 

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LpR 52 | Nov/Dec 2015 

> Tech-Talks BREGENZ: Jy Bhardwaj
> Research: Simulation of PC LEDs
> Innovations: Modules, Electronics & Plastics
> Events: LpS Review & Product Trends

 

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Commentary
Lighting Beyond Illumination
by Heinz Seyringer, Zumtobel Group    (p 08)

Tech-Talks Bregenz
Dr. Jy Bhardwaj, Lumileds, CTO
compiled by S. Luger, LED professional    (p 28)

LpR 51 | Sept/Oct 2015 

> Special: Zhaga’s Latest Books
> Tech-Talks Bregenz: Andreas Weisl
> Graphene-Based, Spectrally Tunable, Flexible LEDs
> Measurement Uncertainty and Conformity

 

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Commentary
Can We Have that, Please? - What We as a Manufacturer of Lamps are Looking For
by Axel Schmid, Ingo Maurer    (p 08)

Tech-Talks Bregenz
Andreas Weisl, SSC Europe, Vice-President
compiled by S. Luger, LED professional    (p 42)

LpR 50 | July/Aug 2015 

> Exclusive Interview: Shuji Nakamura
> Event Reviews - Focus on Asia and USA
> Color-Tunable, InGaN Nanowire LED Arrays
> Lighting with LEDs – More than just Illuminating Objects

 

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Commentary
Creating Growth for the Lighting Industry in Europe with New Opportunities
by Diederik de Stoppelaar, LightingEurope    (p 06)

Exclusive Interview
Nobel Prize and Global Energy Prize Winner Prof. Shuji Nakamura
compiled by S. Luger, LED professional    (p 30)

Research
Flexible OLEDs for Lighting Applications
by Tanzim Baig, Holst Center    (p 40)

Technologies
InGaN Nanowire LEDs to Make Light Mixing Efficient and Smart
by Prof. Zetian Mi et al., McGill University    (p 44)

New Class of Siloxane Polymers for Advanced LED Packaging
by Dr. Juha Rantala et al., Inkron    (p 48)

Quality
Lighting with LEDs – More than just Illuminating Objects
by M. Canazai & W. Pohl et al., Bartenbach    (p 78)

 

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LpR 49 | May/June 2015 

> International Year of Light 2015
> Wafer Level Packaging
> Thermal Management of LEDs
> Tech-Talks Bregenz: Daniel Doxsee

 

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Commentary
A Confusing Situation that Demands Solutions: Performance Specification
by Jacob Nuesink, DEKRA Certification    (p 06)

Events
First EBV Lighting Academy Summary Report
by Arno Grabher-Meyer, LED professional    (p 40)

> International Year of Light 2015 - Opening
> DC Supply Grids for LED Lighting
> Phase Cut Dimming
> Tech-Talks BREGENZ: Ewing Liu

 

> Special: EnLight Project Outcomes

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Commentary
LED Innovation Will Offer a Human-Centric Smart Lighting Platform Enabling Enterprise IoT
by Frank Harder, Samsung    (p 06)

Events
Let there be Light - A Brief Overview of the Meaning of Light
by Arno Grabher-Meyer, LED professional    (p 32)

LpR 47 | Jan/Feb 2015 

> International Year of Light 2015
> Tech-Talks BREGENZ: Mehmet Arik
> Well-Being in Office Applications
> Light Measurement & Quality Parameters

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Leading Article
2015 Year of (LED) Light
by Dr. Amrita Prasad, LED professional    (p 32)

LpR 46 | Nov/Dec 2014 

> Tech-Talks BREGENZ: Prof. Jiangen Pan
> LpS 2014 Review
> Color Quality and New Binning Strategies
> SSL Cost Issues and Potentials

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Tech-Talks BREGENZ
Prof. Jiangen Pan , Founder & CTO / Everfine
by Dr. Amrita Prasad, LED professional (p 28)

LpR 45 | Sept/Oct 2014 

> Tech-Talks BREGENZ: Dietmar Zembrot
> Technologies for High Quality LED Lighting
> Smart Lighting & Human Centric Lighting
> Advanced Thermal Management Technologies

 

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Tech-Talks BREGENZ
Dietmar Zembrot, LightingEurope, President / TRILUX, CTO
by Dr. Amrita Prasad, LED professional (p 30)

> Tech-Talks BREGENZ: Walter Werner
> Advanced Primary Optics
> LED Light Spectrum Enhancement
> Discomfort Glare Perception

 

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Tech-Talks BREGENZ
Walter Werner, Werner Mgmt. Services, CEO
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p 28)

> Tech-Talks BREGENZ: Martina Paul
> Light + Building 2014: Post-Show Report
> White LED Color Design
> Smart Lighting Report

 

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Tech-Talks BREGENZ
Martina Paul, General Secretary, CIE
by Siegfried Luger, LED professional (p 34)

Technology
White LED Color Design and Variation Reduction
by Ichikawa Akira, Asahi Rubber (p 62)

Special Topic
Technology Aspects for the Smart Buildings Lighting Controls Business
by Arno Grabher-Meyer, LED professional (p 68)

 

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 LpR 42 | Mar/Apr 2014 - Light+Building, Lightfair International Issue

> OLED Technology Trends
> LED Technologies for Streetlighting
> Smart Lighting - Sensor & Wireless Control
> LED Reliability - Overstress & Solder Joints

 

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Events
Lighting Japan – Strong Focus on OLEDs
by Arno Grabher-Meyer, LED professional (p 30)

Electronics
Electrical Overstress Protection of LEDs with Proper Circuit Design and Layout Practices
by Ron Bonné, Takaaki Yagi & Masaki Nishizawa, Philips Lumileds (p 52)

Application
Sensor-Driven Designs to Allow More LED Bins and Lower Costs
by Sajol Ghoshal, ams (p 64)

Standardization
ZigBee Light Link – The Technology for Residential Wireless Lighting Control
Simon den Uijl et al., The Connected Lighting Alliance (p 74)

Optics
Using Interactive Optimization Utilities to Improve LED Lightpipe Designs
Dr. Edward Freniere & Michael Gauvin, Lambda Research Corp. (p 78)

 

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LpR 41 | Jan/Feb 2014

> Photometry Standardization
> Measurement with Integrating Spheres
> Standards for Smart Lighting
> Voltage Limits for PWM Operated LED Drivers
> Article Index 2013

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Standardization
Photometry Standardization Developments for OLEDs and LEDs
by Tony Bergen & Peter Blattner, CIE Division 2 (p 24)

Electronics
Safety Issues for LED Drivers with PWM Operation Modes
by Siegfried Luger, Luger Research & John Showell, Product Approvals (p 44)

Measurement
Using Integrating Spheres Correctly to Measure LEDs
by Mikolaj Przybyla, GL OPTIC / Just Normlicht GmbH (p 48)

Application
LightingMonaLisawithLEDs-DetailsConcerningInnovatingTechniques
by Marc Fontoynont et al., Interdisciplinary Development Team (p 52)

 

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LpR 40 | Nov/Dec 2013

> LpS 2013 Review
> Standards & LED Measurement
> LED Drivers with Special Features
> LED Light Quality

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Events
LpS 2013 - A Comprehensive Program, Trends, Innovations and New Product Launches
by Arno Grabher-Meyer, LED professional (p 22)

LpR 39 | Sept/Oct 2013

> Reliability-Oriented Design
> Natural Design for Heat Sinks
> Micro- and Nanostructured 3D LED Technologies
> Safety Regulations & Production Testing

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Special Topics
Solid-State Lighting Considerations
by Siegfried Luger, LED professional (p 30)

LpR 38 | July/Aug 2013

> In-Line Process Control
> LED Lighting Taiwan
> OLED Technology Status & Outlook
> MOCVD Platforms

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Evntes
LED Lighting Taiwan Review -
Focus on Taiwan’s Key Players in the SSL Market 
by Arno Grabher-Meyer, LED professional (p 30)

LpR 37 | May/June 2013

> Heatsinks & Silicones
> Electrical Protection of LEDs
> Fluorescent Tube Replacement
> Optical Lithography

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Application
FL Replacement LED Tubes - Challenges and Technologies
by Arno Grabher-Meyer, LED professional (p32)

 

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LpR 36 | Mar/Apr 2013

> Printed Optics
> LED Light Bulb Technology
> Material Parameters of Optical Encapsulates
> Emission Characteristic & Efficiency

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Standardization
Labeling and Certification Testing Issues
by Arno Grabher-Meyer, LED professional (p30)

 

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LpR 35 | Jan/Feb 2013

> Zhaga - A Successful Strategy
> Copper Bonding Wires
> TRIAC Dimming - EMI
> Lacquer Systems for PCBs

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Commentary
The Mandatory Basis for Professional LED Lighting
by Guido Nattkemper, BAG electronics Group (p 4)

Events
LED Acceptance in the Global Lighting Market Continues to Grow
by Alan Mills, LED professional (p26)

Interview
Zhaga – A Successful Strategy for Luminary Manufacturers
by Siegfried Luger, LED professional (p 30)

Electronics
EMI Problems in TRIAC Dimmable LED Drivers
by Bianca Aichinger, RECOM Lighting (p38)

 

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LpR 34 | Nov/Dec 2012

> LpS 2012 Review
> OLED Tech-Panel Discussion
> Sensors and Feedback Control
> Tunable Lens Technology

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Commentary
It's the Overall Solution that Counts, Not the Single Component
by Stephan Wegstein, RECOM Lighting (p 4)

Events
LpS 2012 Awed Lighting Experts with Its Top Class Exhibition and a New Interactive Lecture Concept
by Arno Grabher-Meyer, LED professional (p 24)

Interview
LpS 2012 - OLED Technologies Tech-Panel Discussion
Summary of an Expert Discussion by Siegfried Luger, LED professional (p 38)

Application
Human-Centric Lighting: Sensor Technology for Full-Spectrum Lighting Solutions
by Sajol Goshal, ams (p 42)

Sensors and Feedback Control of Multi-Color LED Systems
by Thomas Nimz, Fredrik Hailer & Kevin Jensen, MAZeT GmbH (p 46)

Optics
Focus Tunable Lenses for LED Lighting
by Joerg Wertli, Optotune AG (p 50)

Thermal Management
Designing Integrated High-Power LED Systems
by A. Lohrer, Endrich Bauelemente & J. Schäfer, TURCK duotec (p 54)

 

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LpR 33 | Sept/Oct 2012

> Special Topic: Zhaga
> Aspects of Light Quality
> Photometry for Street Lighting
> Thermal Simulations of Retrofit LED Bulbs

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Commentary
Is the LED Fit for Lighting Solutions
by Peter Dehoff, Zumtobel Austria (p 4)

Project
An LED Solution for Historic Monumental Electric Chandeliers
by Ron Ramselaar, Ramselaar Lighting Solutions & M. Brouwers, Government Buildings Agency    (p 30)

Practical Results of a Gas Station Refurbishment with LED Luminaires
by Stelian Matei, Electromagnetica SA    (p 34)

Application
Development Process for a Metal-Halide Replacement LED Module
by Fred Bass, Neonlite International Ltd. & MEGAMAN    (p 38)

Interview
LED Market and Development Trends from the Point of View of a Full-Range Trader in Lighting
Interview with Beate Jungwirth & Dr. Christopher Keusch from Everlight
by Siegfried Luger & Arno Grabher-Meyer, LED professional    (p 42)

LpR 32 | July/Aug 2012

> LpS 2012 - Preview
> LED Substrate Technology
> LED Operating Junction Temperature
> Remote Phosphor Optimization

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Commentary
Class Instead of Mass - Quality Makes the Difference with LEDs, too
by Sigrun Heiden, editor for the technical journal LICHT(p4)

Events
LFI 2012, LED-Lighting and Architecture Progress
by Alan Mills, LED professional (p24)

LpS 2012 Preview - Latest Technologies, Presentations, Discussions and Networking
by Gerlinde Graf, LED professional (p28)

Interview
Metal Alloy Substrate Technology - An Alternative to Sapphire
Interview with Dr. Chuong Anh Tran, President at SemiLEDs Corp.
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p34)

LpR 31 | May/June 2012

> Light+Building Review
> Zhaga Standardization
> LED Module Selection Considerations
> Driverless LED Light Engines

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Commentary
The Future Lies in LED Lighting - Trade Fair Impressions of an Exhimiting Network
by Sebastian Lyschick, Osram Opto Semiconductors (p4)

Events
Light+Building Review – Zhaga Standard, High Quality Lighting & OLEDs
by Arno Grabher-Meyer, LED professional (p26)

Interview
Zhaga - Insights into the New LED Lighting “Standard” for Light Engines
Interview with Zhaga spokesperson Greg Galluccio, Leviton
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p38)

LpR 30 | Mar/Apr 2012

> Light+Building Preview
> LED Modules & PCBs
> Phosphor Green LEDs
> Buck-Based Offline Drivers

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Commentary
Solid State Luminaires Pave the Way for an Industry: From Metal Sheet Forming to Optoelectronic Systems
by Christian Hochfilzer, Regent Lighting (p4)

Events
Light+Building Highlights – Exhibits Focus on Energy Efficiency and Versatility
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p26)

Interview
LED Technology – Changing the Component Business in the Area of Lighting
Interview with Volker Neu, Vossloh-Schwabe Optoelectronic
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p34)

Application
New Approach for a Modular LED COB System up to 500 W
by Magnus Ahlstedt & Johann Ramchen, Optogan (p38)

Technology
Closing the Green Gap: A Long-Pass Dichroic Filter-Capped PC-LED
by Young Rag Do, Department of Chemistry, Kookmin University (p46)

Electronics
Energy Efficiency of Buck-Based Offline LED Drivers
by Mikka Maaspuro, Pauli Auramaa & Aulis Tuominen, Univ. of Turku (p52)

 

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LpR 29 | Jan/Feb 2012

> LED Driver Technologies
> Planar Remote Phosphor Technology
> Silicon Integrated Passive Device Technology
> OLED Report

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Commentary
LED Lighting Trends in 2012: The Rise of Lighting Solutions?
by Pars Mukish, Yole Développement (p4)

Events
Organic Light Emitting Diodes (OLEDs) Continue to Advance
by Alan R. Mills, LED professional (p26)

Interview
Microcontroller Based LED Drivers Initiate New Potentials
Interview with Alex Zaretsky, Lighting Segment Marketing Manager, Renesas Electronics Europe GmbH
by Siegfried Luger & Arno Grabher-Meyer, LED professional (p30)

Technology
Fundamentals of Planar Remote Phosphor LEDs
by Dr. Yosi Shani, CTO, Oree (p34)

Optics
Polycarbonate Leads in LED Applications
by Bala Ambravan, Global Product Marketing Director, SABIC (p44)

Electronics
Resonant Converter Based LED Drivers
by Peter B. Green, LED Group Manager, International Rectifier (p48)

 

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LpR 28 | Nov/Dec 2011

> LpS 2011 - Review
> AC LED Technology
> Print-Optical Technology
> Fluid Cooling

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Events
LED professional Symposium +Expo 2011
Fascinated LED Lighting Specialists from All Over the World 
by Arno Grabher-Meyer, LED professional (p26)

Interview
New Aspects of AC LED Technologies
Interview with Manuel Zarauza,Managing Dir., Seoul Semiconductor 
by Siegfried Luger, LED professional (p40)

Optics
LED Secondary Optics Technology
by Molly Lin, Marketing Section Manager, Ledlink (p44)

Print-Optical Technology – Manufacture LED Lenses by Stacking Droplets-On-Demand
by Richard de Vrie, CEO, Kurt Blessing, CTO, LUXeXceL Group B.V. (p48)

Thermal
Effective LED Replacement Bulb Cooling by Passive Convection
by David Horn, CTO, Ronan Le Toquin, Tech. Director, Switch Lighting (p54)

 

LpR 27 | Sept/Oct 2011

> Enhanced LED Driving Concepts
> Patterned Sapphire Substrates
> HB-LEDs on FR4 PCBs
> Lighting Event Report
> PREVIEW - LpS 2011

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Events
LpS 2011 Advisory Board Q & A
by Siegfried Luger, LED professional (p26)

LED Lighting Taiwan 2011 - Photonics is LEDs
by Arno Grabher-Meyer, LED professional (p28)

Interview
New Technology Concepts in the LED Lighting Industry Thomas Zabel, e:lumix 
by Siegfried Luger, LED professional (p38)

Technology
Sapphire Wafer Wet Etching versus Dry Etching
by Carolyn Gruske & Derek Mendes, Imtec Acculine Inc. (p42)

Electronics
An Advanced and Complete LED Driving Solution
by Luigi Pistoni & Massimiliano Merisio, STMicroelectronics (p48)

High-Efficient, High-Power Multi-Channel LED Driver
by Winfried Beyer & Stephan Gruber, exscitron GmbH (p54)

Special Topics
High Brightness LEDs on FR4 Laminates
by Gerhard Neumann, melecs GmbH & Co KG (p62)

 

LpR 26 | July/Aug 2011

> Color Conversion Technologies
> Driver Reliability
> Driver Technology for Optimized Efficiency
> Interview: Insights Into Recent LED Developments

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Interview
"Insights Into Recent LED Developments" Interview with Eric Virey, Yole Développement
by Siegfried Luger and Arno Grabher-Meyer, LED professional (p 24)

Technology
"Growing GaN Epi Layers on 200 mm Silicon Substrates for LED Applications"
by Kai Cheng, Johan Dekoster, imec, and Sung Won Jun, Jose-Ignacio Del-Agua-Borniquel, Applied Materials (p 28)

"Influence of the Phosphor Selection on Lighting Quality"
by Dan O’Hare and Jonathan H. Melman, Intematix (p 34)

Electronics
"Highly Efficient and Reliable Power Supply for LED Street Lighting"
by Wonseok Kang and Sungmo Young, Fairchild Semiconductor (p 40)

"LED Drivers Help to Make LED Lighting Costs Competitive without Compromising Quality"
by Steve Roberts, Recom (p 44)

"LED Driving Techniques to Hit Power Efficiency Targets of TV Backlight Systems"
by Werner Schögler, Markus Luidolt, Manfred Pauritsch and Peter Rust, austriamicrosystems AG (p 48)

 

LpR 25 | May/June 2011

> LED Street Lighting
> DC-Microgrids
> LED Signage Driver
> Thermal Management
> LED Investor Forum

 

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Event
"LED Investor Forum 2011 - Santa Clara" by Alan R. Miles, LED professional (p26)

Interview
"LED Street Lighting - About Standards, Challenges and Misconceptions"
Interview with Prof. Tran Quoc Khanh, TU Darmstadt
by Siegfried Luger and Arno Grabher-Meyer, LED professional (p30)

Application
"DC Microgrids and SSL - Key Components for Zero Net Energy Buildings" 
by Brian T. Patterson, EMerge Alliance and Karen Lee, Osram Sylvania (p34)

Electronics
"LED Driver Innovations for High-Performance Signage"
by Roland Gehrmann, Toshiba Consumer & Industrial ICs (p40)

Thermal
"LED Cooling in Harsh Environments with Synthetic Jet Technology"
by Markus Schwickert and Brandon Noska, Nuventix (p44)

"Thermal Management of LED Lamps"
by A.Motoya, M. Kai, Y. Manabe and S.Shida, Panasonic Corp. (p48)

Special Topics
"HB-LED Alert Device with Intense Light Output"
by Jerry Vereen, Egret Technologies

 

LpR 24 | Mar./Apr. 2011

> Color Rendition Metric for LEDs
> DC-Grid & Communication
> LED Replacement Bulbs
> LED Cooling 
> Optical Plastics

 

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Interview
"The Optical Plastics Make a Difference to a Lens"
Interview with Peter Jackson and Tsuyoshi Okii from Styron LLC
by Arno Grabher-Meyer, LED professional (p 28)

Application
Active Cooled 75 to 100 W Equivalent LED Retrofit Bulbs
by Istvan Bakk, Tridonic, and Brandon Noska, Nuventix (p 32)

Re-Thinking a New Power and Control System for LED Lighting
by Mark Covaro, Redwood Systems (p 38)

Characterization
Advanced Lighting Technology Needs an Advanced Color Rendition Metric 
by Artūras Žukauskas, Rimantas Vaicekauskas, Vilnius University, Michael Shur, Rensselaer Polytechnic Institute(p 44)

Electronics
Sophisticated LED Driver Enhances Quality in Full Color Video Displays
by L. Pistoni, M. Merisiso, F. Lissoni, and W. Trovo, ST Microelectronics (p 50)

Thermal
Cooling High Power LEDs
by Norbert Engelberts, Advanced Thermal Solutions (p 54)

Remarks:
LED professional appologizes for erroneously having published a wrong author reference for the article "Advanced Lighting Technology Needs an Advanced Color Rendition Metric" in the index of this LpR issue. The correct title and acknowledgement should be: Advanced Lighting Technology Needs an Advanced Color Rendition Metric by Artūras Žukauskas, Rimantas Vaicekauskas, Vilnius University, Michael Shur, Rensselaer Polytechnic Institute (p 44)
If you have downloaded your copy before April 5th, 2011, please download the newly uploaded version again!

 

LpR 23 | Jan./Feb. 2011

> OLED Technology & Market Trends
> Digital LED Systems - Interview
> Tunable White Light
> TRIAC Dimming

 

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Events
The Display Industry Drives OLED Technology
by Alan R. Mills, LED professional (p 24)

Interview
"The Future of LED Systems is Digital"
Interview with Peter Deixler, Philips Eindhoven
by Arno Grabher-Meyer, LED professional (p28)

Application
Intelligent Lighting (Part II): From Definition to Implementation
by Osama Mannan, Future Lighting Solutions (p 32)

Technology
Understanding the Pitfalls of Tunable White Light LED Systems
by Madhan Kumar, Sachin Gupta, Cypress Semiconductors (p 38)

Electronics
Triac Dimmable Primary Side Regulated Flyback
by Michael Weirich,Fairchild Global Power ResourceSM Center EP (p 42)

Facts about Dimming
by Gregg Sheehan, Light-Based Technologies (p 48)

Charge Controled LED Drivers
by Jens Göhring, dilitronics (p 56)

Needed Accuracy of an LED Power Supply
by Christopher Richardson, National Semiconductors (p 60)

 

LpR 22 | Nov. / Dec. 2010

> Impressions from electronica
> Digital Controlled Street-Lighting
> TRIAC Dimming without Flickering
> Thermal Foldback Design
> Interview with ON Semiconductor

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Applications
Intelligent Lighting (Part1): From Definition to Implementation
by Osama Mannan, Future Lighting Solutions p26

Technology
“Status Quo and Perspectives of LED Driver ICs - Market and Technology”
Interview with Laurent Jenck and Marc Barboni from On Semiconductor
by Arno Grabher-Meyer, LED professional p32

Thermal Management
Thermal Foldback LED Design
by James Patterson, National Semiconductor Corporation p34

Drivers
Dimming without Flicker for LED Lighting Applications
by Bill Weiss, Power Integrations, Inc. p38

Optimization of LED Control Powered from Line Voltage
by Erhard Muesch , ZMDI p46

Street-Lighting Solution Based on a Digital Current Control
by N. Aiello, G. Macina, ST Microelectronics - IMS Systems Lab p50

The Multi-Stage Off Line LED Driver
by Peter B. Green, International Rectifier p52

 

LpR 21 | Sept. / Oct. 2010

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Applications
SSL Adoption - Opportunities and Obstacles
by David Hammel, Aphos Lighting LLC  (p30)

Characterisation
How Much Store Should the Lighting Industry Set by the ANSI Standard for LED Chromaticity
by Thierry Suzanne, Future Lighting Solutions   (p34)

Technology
Factors That Drive LED Reliability
by Dr. Randy Kong, DfR Solutions  (p38)

Thermal Management
Junction Temperature in Package Design – The Key To Optimal Heat Dissipation
by Kay Fernandez, Lumex  (p42)

Drivers
Ballasts and Drivers for Conventional and Solid State Light Sources
Authors references shown on the article page  (p48)

Special Topics
CO2 Balance Sheet: Aluminum Versus Alumina Ceramics
by Dr. Meinhard Kuntz, CeramTec AG  (p58)

Distribution Today – All from One Source
by Rudy Van Parijs, EBV Technical Development  (p60)

 

 

LED Testing, Simulation & Manufacturing
LpR 20 | July / Aug 2010

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Characterization
LED Luminaire Lifetime: Recommendations for Testing and Reporting
by DOE Lifetime and Reliability Working Group (p22)

Comparison of Test Results from Different Korean Testing Laboratories
by Dong-Hoon Lee et al., Korea Research Institute of Standards and Science (p24)

Technology
LED Failure Modes and Methods for Analysis
by Holger Pross, RoodMicrotec GmbH (p28)

Optics
Considerations for Choosing a Miniature Spectrometer for LED Measurements
by Ryan M. Flaherty, Jason D. Pierce, Michelle Dean Ritchie, StellarNet, Inc. (p32)

Drivers
Traffic Lights and Signage Need Intelligence
by Alex Zaretsky, Renesas Electronics Europe (p38)

Special Topics
Distributor - Arrow: From Drivers to Diodes - All from One Single Source
by Stephan Wegstein, Arrow Central Europe GmbH (p42)

 

LED Light Generation

LpR 19 | May / June 2010

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Event Reports
Light+Building Review
by Arno Grabher-Meyer, LED professional (p20)

New Era for LEDs in Lighting
by Alan R. Mills PhD., LED professional (p28)

Applications
Incandescent Replacement Lamps and Health
by Wout van Bommel, Van Bommel Lighting Consultant (p30)

The Future of OLED Lighting
by Ian Ashdown, byHeart Consultants Ltd; Brent York, Tangenesys Consulting Ltd. (p34)

LED High Bay Lighting
by Michael Schratz, Dialight Corp. (p38)

Optics
Design and Manufacture of Achromatic Lenses
by Christoph Gerhard, Dr. Geoff Adams and Stephanie Wienecke (p40)

Drivers
About PLC Reliability
by Ashish Garg & Angad Singh Gill, Cypress Semiconductor Corp. (p44)

Exploration on Transmission Technology of RGB LED in Architectural Lighting
by Tiger Yen and Jerome Lee, Macroblock, Inc. (p48)

Optimizing LED Drivers for Power, Display Life and the Visual Experience
by Irene Signorino, Arkadiy Peker, Kevin Choi, Microsemi Corp. (p53)

Special Topics
Component Distributors – Partners for the LED Industry
by Ingo Guertler, Europartners Consultants; Siegfried Luger, LED professional (p58)

LED professional – Patent Report (p60)

LED Application & Lighting Systems
Issue 18 | Mar / Apr 2010

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Applications
LED in General Lighting Applications
by Günther Sejkora, items – Innovation and Technology Management (p24)

LEDs For Shop Lighting: Interview with lighting designer Simone Mariotto
by Arno Grabher-Meyer, LED professional (p28)

Addressing the Rising Requirements for Solid State Lighting Products
by Mitch Sayers, Cree Europe GmbH (p32)

OLED Technology – Status of a Promising Lighting Solution
by Siegfried Luger, LED professional (p36)

LED Retrofits for Antique Style Roadway and Walkway Lights
by Heather Goldsmith, Future Lighting Solutions (p40)

Technology
High Quality GaN Substrates for Modern LED Technology
by A.E. Romanov, et al., CJSC “Optogan” / Ioffe Physical-Technical Institute RAS (p42)

Thermal Management
LED – Cooling and Thermal Management
by Lothar Noelle, Fischer Elektronik (p50)

Drivers
Intelligent LED Driver/Controllers Becoming Standard Modules
by Albert Berghuis, eldoLED (p56)

LED professional – Patent Report (p60)

 

LED Thermal Management
Issue 17 | Jan / Feb 2010

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Event Reports
LED Forum Moscow 2009 & Interlight Moscow
by A. Grabher-Meyer, LED professional (p18)

Thermal Management
Thermally Activated Degradation of Phosphor-Converted White LEDs
by L. Trevisanello, M. Meneghini, Dept. of Information Engineering, University of Padova (p22)

LEDs and Heat: Managed or Micromanaged
by Dan Jacobs, OPTEK Technology (p30)

Advanced Thermal Management Materials for LED Packaging
by Carl Zweben, Ph. D., Advanced Thermal Materials Consultant (p34)

Thermally Conductive Plastics: Balancing Material Properties with Application Needs
by Dr. Ir. R.H.C. Janssen, Dr. Ir. L. Douven, Dr. H. K. van Dijk, DSM Research (p38)

Drivers
Driver Design Based on System Blocks
by Jon D. Pearson, Cypress Semiconductor Corp. (p42)

Annual LED professional Review (LpR) Article Index 2009 (p46)

LED professional – Patent Report (p48)

 

LED Testing, Simulation & Manufacturing
Issue 16 | Nov / Dec 2009

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Event Reports
OLEDs 2009
by Alan R. Mills, LED professional (p14)

Applications
A Comparison of High Level European and U.S. Product Safety Requirements
by John Showell, Product Approvals Ltd. (p16)

Technologies
Low Cost of Ownership Lithography for High Brightness LED Manufacturing
by D. E. Anberg, Advanced Stepper Technology, A. M. Hawryluk, Ultratech Inc. (p22)

Optics
Practical LED Light Measurement
by Wolfgang Dähn, Bob Angelo, Gigahertz-Optik (p28)

Photometric Measurements in Modern LED Based Optical and Illumination Systems
by Juergen P. Weisshaar, Uta Vocke, opsira GmbH (p32)

Imaging Colorimetry: LED Device, Luminaire and Display
by Hubert Kostal, Radiant Imaging, Inc., Christina Boehme, SphereOptics GmbH (p36)

Thermal Management
When Designing with Power LEDs, Consider Their Real Thermal Resistance
by Dr. András Poppe, MicReD Division, Mentor Graphics Corp. (p42)

Silicones in LED’s for Heat Dissipation and Improved Light Output
by Chris Dawson, ACC Silicones (p46)

Drivers
Short Explanation of Critical Elements of a HB-LED Driver
by Rakesh Reddy, Cypress Semiconductor Corp. (p50)

LED professional – Patent Report (p52)

 

LED Primary & Secondary Optics
Issue 15 | Sept / Oct 2009

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Application
Electrical Considerations of LED Bulbs
by Siegfried Luger, Arno Grabher-Meyer and Lukas Gorbach, LED professional (p14)

Optocouplers – A Critical Design Element in LED Bulbs
by Arno Grabher-Meyer, LED professional (p17)

Case Study – LED Solution Offers Advantages for Henkel Waste Water Plant
by Gordon Routledge, Dialight, Boris Viner, Consultant to Dialight (p20)

Technology
High Efficiency Reflective Mirror Type LED
by Shigeru Yamazaki, Alpha-One Electronics Ltd. (p24)

Optics
All Facts for Choosing LED Optics Correctly
by Tomi Kuntze, LEDIL Oy (p28)

Primary and Secondary Optic Materials - LED Luminaire Performance and Lifetime
by Thomas Brukilacchio, Ph.D., Innovations in Optics Inc (p32)
Shaping the Beam – the Role of Primary and Secondary Optics

by Rudi Hechfellner, Philips Lumileds; Dave Cohen, Fraen Optical Manufacturing Group (p40)
Save Space with Focus Tunable Lenses

by Mark Blum, MSc EE , Manuel Aschwanden, PhD , David Niederer, MSc ME, Optotune (p43)
Parameters to Consider for LED Optics Design

by Guido Campadelli, Fraen Corporation (p46)

LED professional – Patent Report (p48)

 

Light Generation
Issue 14 | July / Aug 2009

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Application
Using RGB LEDs for Multi-Color Sign Applications
by Andreas Pohl, Avago Technologies (p12)

Effective Illumination for Internally-lit LED Signs
by M. Nisa Khan, Ph.D., LED Lighting Technologies (p16)

Interview with Navid Delassaee - Citizen Electronics
by Siegfried Luger, LED professional (p20)

Technology
Quantum Dots in LED Lighting: Improving Color Quality Without Sacrificing Efficiency
by Dr. Sridhar Sadasivan, Dr. Seth Coe-Sullivan, QD Vision, Inc. (p22)

Chip-Array-on-Ceramic LED: A Versatile Solution to High Performance LED Luminaires
by Dr. Gang Wang, Dr. Ian Collier, Dr. Ilkan Cokgor, Harik Su and Dr. Yi-qun Li, Intematix (p26)

Driver
Primary Side Regulation: Low Cost and High Efficiency Offline LED Driver
by Hangseok Choi, Fairchild Semiconductor (p30)

Thermal Derating of LEDs
by Steve Roberts, Recom (p32)

Thermal Management
Thermal Management of High Power LEDs
by Norbert P. Engelberts, Advanced Thermal Solutions (p36)

LED professional – Patent Report (p40)

 

Thermal Management
Issue 13 | May / June 2009

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Characterization
Methodology for Thermal and Electrical Characterization of Large Area OLEDs
by A. Poppe et al, Budapest Univ. of Tech., Mentor Graphics, Philips Research Lab. (p15)

On the Standardization of Thermal Characterization of LEDs
by A. Poppe et al, Budapest Univ. of Tech., Mentor Graphics, Philips Research Lab. (p22)

Effect of Thermal Environment on LED Light Emission and Lifetime
by Cathy Biber, Ph.D., Biber Thermal Design, Ltd (p30)

Driver
Advantages of Integrating Power and Control for LED Lighting Applications
by Gavin Hesse and Rakesh Reddy, Cypress Semiconductor (p36)

Constant Current Regulators Support LED Lighting Solutions
by Tim Kaske, Paul Decloedt, ON Semiconductor (p40)

Thermal Management
Comparison of Passive and Active Cooling Effectiveness
by Che Cheung, Brandon Noska and Kim van der Heide, Nuventix (p42)
Thermal Management of High-Power LED Systems

by Maurice J. Marongiu, PhD, MJM Engineering Co. (p47)
Selecting the Right Thermal Interface Material for LED Applications

by Robert Kranz, Dr. Richard Hill, Laird Technologies, Inc (p50)
Thermal Management of Sophisticated LED Solutions

by Dr. Michel Kazempoor, PerkinElmer (p53)
Design Process for a Customer-Specific Ceramic Heat Sink
by Rüdiger Herrmann, CeramTec AG (p56)

LED professional – Patent Report (p60)

 

LED Applications & Lighting Systems
Issue 12 | March / April 2009

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Project
LED Makeover, Yielding 90% Energy Saving
by Alexander Mueller, Future Lighting Solutions (p16)

Application
ALADIN – An Advanced Lighting System for Improved Health and Wellbeing
by Edith Maier, Walter Ritter, Univ. of Appl. Sciences Vorarlberg, and St. Gallen (p20)

A New White Light Solution Using an End-User Design Approach
by Gary Trott, Cree LED Lighting (p28)

Merging Technology and Biomorphic Design
by Christie Liu, BComm Marketing & Lumolar (p32)

Light 2.0: LEDs Create an Entirely New Generation of Lamps
by Andreas Biß, Sharp Microelectronics Europe (p34)

The Future of LED Illuminators
by John Popovich, Column8 (p38)

Thermal Management
Ceramic Simplifies Heat Dissipation
by Dr. Armin Veitl, Altair Engineering GmbH (p45)

 

LED Electronics
Issue 11 | Jan/ Feb 2009

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Characterization
Defining Lighting Class LEDs
by Ralph Buehler, Cree Inc. (p14)

Technology
Jet Dispensing Technology for Capillary Underfiller
by Anton Knupfer, Essemtec AG (p18)

Driver
Off-Line LED Control Circuit
by Tom Ribarich, International Rectifier (p21)

Current Uniformity for LED Display Drivers
by Frank Shih, Macroblock (p25)

Driving Compact Lamps Having High-Brightness LEDs
by Rafael A. Pinto et al., Federal University of Santa Marial (p29)

Basic Topologies for Driving LEDs
by Steve Winder, Supertex Inc. (p33)

 

LED System Simulation and Testing
Issue 10 | Nov/Dec 2008

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Characterization
LED Lighting Technology Fundamentals and Measurement Guidelines
by M. Nisa Khan, Ph.D., LED Lighting Technologies (p14)

CIE 1964 Colorimetric Observer Chart Improves White Light Quality
by Peter Pachlar, Tridonic Atco Optoelectronics (p16)

White Light LEDs – Importance of Accepted Measurement Standards
by Dr. Thomas Nägele; Instrument Systems GmbH (p22)

The Role of Miniature Spectrometers for LED Measurements
by Jorge Macho, Ocean Optics (p26)

Technology
LED Encapsulant Epoxy Curing Optimization
by Bit Tie Chan, Avago Technologies (p30)

Optics
LED Source Modeling Method Evaluations
by Mark Jongewaard, LTI Optics and Kurt Wilcox, Ruud Lighting (p34)

Simulation and Optimization of Optical Systems
by Dr. Norbert Harendt, IB/E OPTICS and Christoph Gerhard, LINOS Photonics (p40)

Thermal Management
Simulating Device Thermal Performance Using PLECS
by Dr. John Schönberger, Plexim GmbH (p44)

Annual LED professional Review (LpR) Article Index 2008 (p46)

 

LED Optics
Issue 09 | Sept/Oct 2008

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Application
Progress in LED and OLED Display Technologies
by M. Nisa Khan, Ph.D., LED Lighting Technologies (p14)

Optics
Microstructured Optics for LED Applications
by Arthur Davis, Reflexite Optical Solutions Business (p18)

Review of SMS Design Methods and Real World Applications
by Oliver Dross et al., Light Prescriptions Innovators LLC (p33)

Plastic Optics Enable LED Lighting Revolution
by Tomi Kuntze, LEDIL Oy (p41)

Driver
New Drive Circuit Supports Wide DC Input and Output Range
by Bernie Weir, ON Semiconductor (p44)

Simple and Accurate Constant Current Sensing for Non-Isolated LED Drivers
by John S. Lo Giudice, STMicroelectronics (p47)

Reliability Test of LED Driven by PWM Technique
by B. J. Huang et al., National Taiwan University (p49)

 

LED Solar Street Lighting

Issue 08 | July/Aug 2008

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Application
City of Kelowna Goes Green with Solar-Powered Area Lighting
by Anthony Tisot, Carmanah Technologies Corporation (p16)

Solar LED Street Lighting
by Steffen Block, OSRAM Opto Semiconductors GmbH, Gerhard Walch, Franz
Jungwirth, EPS soltec, and Arno Grabher-Meyer, LED professional (p18)

Characterization
Integrating Sphere Applications for LED and Solar Cell Measurements
by Sid Rane, SphereOptics (p24)

NIST/DoE: Standards Set for Energy-Conserving LED Lighting (p27)

Technology
Nano-Patterned Sapphire Substrates Improve Performance of GaN-LEDs
by Haiyong Gao, et al, Semiconductor Lighting Technology Res. and Dev. Center (p28)

LED Efficacy: A Matter of Die Structures
by Arno Grabher-Meyer , LED professional (p29)

Increasing Light Extraction Efficiency of GaN LED Chips
by Song, Mi Jeong, Ph.D.; Leniachine, V; Jeong Wook, Lee, Ph.D.; Samsung Research (p34)

A Status on Solar Cell Technology
by Anil Sethi, Flisom AG (p41)

Driver
Solar Driven LED Systems
by Peter B. Green, International Rectifier (p44)

High Efficiency Power Supply for LED Street Lighting Illumination
by Luca Salati, STMicroelectronics (p48)

 

International Fairs, Synthetic Jet Technology,
Photonic-Lattice Technology
Issue 07 | May/June 2008

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Application
Forethoughts on LED Breakouts in Signage
by M. Nisa Khan, Ph.D., LED Lighting Technologies (p16)

Integrated, Exergy-Efficient Office Solution Requires LED General Lighting
by Dr. W. Werner, Dipl. Ing. F. Theßeling, Prof. Dr. H. Leibundgut, ETH Zürich (p18)

Technology
Photonic-Lattice Technology
by Christian Hoepfner, Luminus Devices (p20)

Evolutionary LED Packaging for Increased Flux Density
by Jason Posselt, LedEngin Inc. (p24)

Driver
Parallel LED Luminous Flux Variation
by Ed Wenzel, STMicroelectronics (p28)

Low Noise in LED Driver Circuits
by Roger Alm, Melexis (p30)

Designing with High Efficient LED Driver for LED Lighting
by Chih-Yu Wu, Macroblock (p33)

Comparison Between Continuous (DC) and PWM LED Driving Modes
by Laurent Massol, Arno Grabher-Meyer and Siegfried Luger, LED professional (p34)

Thermal Management
An In-Depth Look at Active Cooling Thermal Management: Synthetic Jet Technology
by Mick Wilcox, Nuventix (p36)

 

Light + Building, Special Edition
Issue 06 | Mar/Apr 2008

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Application
LED-Systems in Shoplighting by Andreas Siegmund, OSRAM GmbH
Interview with Jason Bruges - Jason Bruges Studio by Siegfried Luger, LED professional

Interview with Klaus Vamberszky - Zumtobel Lighting by Siegfried Luger, LED professional

Technology
Discontent Led to Lumiramic Phosphor Technology by Steve Landau, Philips Lumileds
Improvements in Solid State Lighting III-V Semiconductor Production by Dr. Rainer Beccard, AIXTRON AG

Optic
Optics design for Colour Mixing LEDs by Dr. Andreas Timinger, OEC AG

Driver
High Efficiency 200W LED Ballast by Dr. Michael Weirich, Fairchild Semiconductor GmbH

Driving RGB High Power LEDs by Ulrich Kirchenberger and Pavel Koutensky, STMicroelectronics

High-Brightness-LED Control by Peter Green, International Rectifier

Module
Improved LED Modules for General Lighting Market by Christoph Cox, VS-Optoelectronic

 

Colored LED Systems
Issue 05 | Jan/Feb 2008

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Application
High Tech for Time Square’s New Years Eve Ball by Jason Harris Koonce, e:cue Lighting Control

Characterization
Visual Perception Issues of LED Applications by Ingrid M.L. Vogels, Pieter J.H. Seuntiens and Dragan Sekulovski, Philips Research Europe

Measurement of LEDs by Yoshi Ohno, Cameron Miller, and Yuqin Zong, National Institute of Standards and Technology

Technology
High Performance Multi-Color LEDs in Chip-On-Board Technology by Oliver Kückmann and Jörg Hannig, PerkinElmer Elcos GmbH

White Light LED Technology with Increased Efficiency and Variable CCT by Erwin Baumgartner, Lumitech GmbH

LED Binning: A Process to Watch by Joe Mazzochette, Lamina

Methodology
TRIZ Introduction by Siegfried Luger, LED professional

 

LED Thermal Management
Issue 04 | Nov/Dec 2007

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Applications
Thermal Management for LED Luminaires, by Dr. Keith Bahde, Gallium Lighting Systems

Technologies
Challenges Still Linger for Mainstream White LEDs, by Dr. Nisa Khan, Ph.D., Optpelectronic & SSL Technologist

Drivers & Controls
LED Lighting Control Systems: The Next Generation of Lighting, by Abhay Gupta, Echelon Corporation   

Thermal Management
Thermal Management in High Power LED Systems, by Paul Scheidt, CREE

Thermal Management of LED Technology in Applications, by Rainer Huber, Osram Opto Semiconductor GmbH   

High Power LED Thermal  Modeling and Effect of Thermal Interface Materials, by Oon Siang Ling, Avago Technologies

Direct Copper Bonded Ceramic Substrates for Use With Power LEDs, by Dr. Jürgen Schulz-Harder and Alfred Dehmel, Electrovac curamik

Synthetic Jets for Active Cooling of LEDs, by Mick Wilcox and Lee Jones, Nuventix Inc.

Insulated Metal Substrate for Maximum Brightness and Lifetime, by Nico Bruijnis, The Bergquist Company

Thermal Simulations for LED Applications, by Dr. Johannes Adam, Flomerics Ltd.

 

LED Technologies & LED Drivers
Issue 03 | Sept/Oct 2007

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Applications
LED Luminaries for General Illumination
by Dr. Wilfried Pohl, Bartenbach Lichtlabor
 
Technologies
LED Data Sheet comparison
by Arno Grabher-Meyer, LED professional

Light Extraction Boosts Efficiency of Vertical Light Emitting Diodes on Metal Alloy Substrate
by SemiLEDs Corp

Drivers
How linear LED driver IC’s can make it irresistible to replace resistor biasing
by Joachim Glaeser, Hakan Yilmazer, Infineon Technologies AG

Next Generation LED Area Lighting
by Bernie Weir and Frank Cathell, ON Semiconductor

Innovative Analog Control Technologies for Mainstream LED Lighting Market
by Andy Aaron and Jeanette Jackson, Light-Based Technologies Inc.

Solving high-voltage off-line HB-LED constant-current control-circuit issues
by Giovanni Carraro, International Rectifier

Sensors
Improved LED systems with true color sensors
by DI (FH) Fredrik Hailer, MAZeT GmbH

Trends of Engineering System Evolution
Ideality
by Siegfried Luger, LED professional

 

LED Driver
Issue 02 | June/July 2007

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Content:
- Editorial, S. Luger
- Product & Research News
- Recent developments in white phosphors; R.J. Arthley
- Driving LEDs - A real challenge, A. Grabher-Meyer
- Colour compensation, T. Schielke
- Adding intelligence to LED lighting systems, S. Bowling
- What's the favourite colour?, S. Bramble
- Low cost power supply for High Power LED application, M. Weirich
- Next generation MR16 LED lamps powered by driver IC, D.F. Weng & M. Nalbant
- LED lamps require power conversion ICs to meet EMC and quality standards, S. Fimiani    
- Trends of engineering system evolution: S-curve analysis, S. Luger

 

White LEDs

Issue 01 | Mar/Apr 2007

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Content:
- SSC upgrades design and improves brightness of Acriche by 20% to 48 lm/W
- First Domponents presents the industry's brightest single-chip LED with 250 lumens
- New EZBright 700 power chip broadens Cree's high performance chip platform
- New super bright LED light source from Osram Opto Semiconductor
- Philips Lumileds shatters 350 mA performance records with 115 lm/W LED
- Panasonic develops White Color Power LEDs by employing GaN Substrates
- Rensselaer researchers create world's first ideal anti-reflection coating
- Philips LED technology solves efficiendy losses at high drive currents
- LEDs for use in downlights
- White LEDs and Modules for General Lighting
- Lifetime of White LEDs
- Efficacy and colour impression of White LEDs
- White LED Manufacturers
- Trends of Engineering System Evolution