Endurance Test on Photometric Performance for First Generation Led Luminaires

Abstract

Manufacturers of LED luminaires promise very long lifetimes for their products. This is a main advantage compared to traditional light sources. Long operational lifetimes are particularly interesting for reducing maintenance efforts and to ensure the ecological and economical relevance of this technology. However, Light Emitting Diodes typically show a gradual depreciation of their characteristic photometric performances. The key point is thus to make sure that the luminaires still meet the expected performances after many hours of operation.