Research of the biological effectiveness of artificial lighting

The history of mankind numbers about 500 thousand years and overwhelming part of this period of time we have been governed by natural light. The Sun was the only source of light. Try to imagine the world in which people wouldn´t know the ways of getting light. When the sun was setting, all the life stopped, and people hurried to their homes before dark. Now everything has changed. Sometimes people work and stay awake at night or often stay up late. It turns out that light allows us to see not only the world around us, but also it is the chief regulator of our biological rhythms. The interest to the biological effects of light increases every year. It all started with the discovery in 2002 of a new photoreceptor (neither rod, nor cone). Under a definite influence of light on these cells a person feels more cheerful and concentrated. This research work is dedicated to the data analysis of a new photoreceptor. Also the analysis has been done concerning the selection of light source, which will later be used in a lighting control system and with a help of which human biorhythms will be taken into account.