Artificial light sources as a light pollutant of human melatonin suppression

Abstract

Blue light emitted by LEDs might influence the natural biological rhythm of a human being, which can be considered as environment pollution. In this paper the effect of the latest commercially available LEDs on melatonin suppression index (MSI) was analyzed. The research was based on spectral power distribution of a given LED (SPD) and melatonin suppression function in reference to melatonin suppression under daylight (illuminant D65). The results of calculations show a strong correlation between CCT and MSI; however, MSI factor might vary for different LEDs with the same CCT.