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Photometric devices are devices that measure optical radiation and which are designed with a very specific spectral response. Most commonly, illuminance meters ...

Modern Solid State Lighting (SSL) technology has long since found its way into our normal working and living environments. In the early phases, consumers were ...

Article from LpR 66 | page 80: It is difficult to accurately predict the lifetime or the light output degradation of LED luminaires. A Constant Light Output ...