APPLICATION STUDIES ON NON-VISUAL EFFECTS OF LIGHT WITH TRADITIONAL AND SOLID STATE LIGHT SOURCES

Beyond vision, light affects humans physiologically and psychologically with considerable impact on health and wellbeing. Effects known for decades and attributed to natural daylight now seem feasible to be achieved with artificial lighting systems as knowledge on non-visual effects increases. There is general consensus in lighting experts that natural daylight can't be fully replaced by artificial light, as complex dynamic changes and their impact on wellbeing are not likely to be understood in conceivable time. Other aspects like view out are in general not addressed by artificial illumination. But despite these limitations, there is also a growing consensus to include recently developed knowledge on non-visual effects of light into interior lighting solutions. The idea is to provide as much as possible all necessary stimuli for the human biology in the indoor environment to support human performance, health and wellbeing.