Tunable natural light realized by phosphor-innovation light-emitting-diode technology

The nature and quality of artificial lighting are becoming more and more recognized and debated issues concerning their impact on comfort, well-being and even human’s health (chronobiology). Therefore, the target must be to emulate natural (sun) light for indoor illumination. In this paper parameters which are responsible for the nature and quality of light sources are elaborated. Leading edge high quality light sources, realized by light emitting diodes (LEDs) for emulating natural light, are presented.