Due to the harmful effects of lighting pollution on environment and humans, the Government of Republic of Slovenia in 2007 accepted the Decree on limit values due to light pollution. The Decree covers all the key problems of light pollution, but due to rapid acceptance and non cooperation of profession some things are useless in practice.
The project presents an overview of electrical energy consumption of public lighting in Slovenian municipalities in 2014. Data ware acquired personally, from each municipality and from lighting designs, which are required by the 21. article of the Decree on limit values due to light pollution. Using data of energy consumption of public lighting the comparison of energy consumption, per resident, per kilometre of lighted road, per area of lighted public surface, per lighted facade or cultural monument and energy consumption on street lamp was made. Data analysis showed that the energy consumption in majority of Slovenian municipalities is reducing from year to year, as a result of the Decree on limit values due to light pollution.