Continuously growing night lighting is recognized as a serious ecological problem of the last decades. Light pollution (LP) represents a negative impact on exposed living organisms, including human beings, and usually is the effect of an unnecessary light that results in a high amount of wasted energy. LP is not as widely known as it should be, but it is increasingly studied to the extent that many countries and organizations are implementing regulations and recommendations for its treatment.
The problem has an unfavorable influence on the life conditions of biological species, including humans. Unnecessary artificial light disturbs the natural night cycles and makes serious ecological imbalances to the life of the planet. All these modifications in the biodiversity can produce serious problems, such as ecological changes of some important species.
By comparing five different lamps, the present study attempts to evaluate UV ans visible radiative fluxes relative to what humans and different species of plants and animals perceive as sky glow level. We analyze three atmospheric situations: clear sky, overcast sky and evolving precipitable water content.