Energy saving in street lighting in Lithuania – trends in renovation

Ramunas Balsys, Albertas Mikulionis, Valdas Pakenas, and Alfonsas Vaskys, Kaunas University of Technology, Lithuania

Keywords

street lighting, luminaire, high-pressure sodium lamp, high-pressure mercury lamp, high-pressure metal halide lamp, illuminance, luminance, luminous intensity distribution curve, luminance uniformity

Abstract

Energy charges make the largest part of expenses for street lighting in Lithuania. This is conditioned by use of energy in-efficient lamps in use and obsolete luminaires. The quality of street lighting is not good in spite of considerable energy consumption.

Review of street lighting condition in Lithuanian towns is carried out and prospects for perfection of street lighting are shown.

The feasibility studies of street lighting projects are carried out in Kaunas University of Technology (for Kaunas and Utena) in order to reduce electric energy consumption and to improve the street lighting. On the basis of these studies the pilot Kaunas street lighting renovation project was made. This project is under realization now. The results of the mentioned project may be used for further improvement of street lighting in towns of Lithuania in order to make street lighting correspondent to European Standards decreasing consumption of electric energy.

On basis of current condition estimation the proposals for investment projects are made. These projects should make street lighting quality better decreasing maintenance expenses of lighting system.