Artificial light sources as light pollutant of humans melatonin suppression


  • Piotr Jakubowski PhD student at Electrical Engineering Faculty, Bialystok University of Technology, Wiejska 45d, 15-351 Bialystok, Poland



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

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How to Cite

P. Jakubowski, “Artificial light sources as light pollutant of humans melatonin suppression”, Photonics Lett. Pol., vol. 11, no. 3, pp. 78–80, Sep. 2019.