Guseinoviene, E., A. Senulis, J. Vaupsas, J. Januteniene, and B. Rudnickij. “Possibilities of Energy Savings through Conversion to LED Lighting in Western Region of Lithuania”. Elektronika Ir Elektrotechnika, vol. 120, no. 4, Apr. 2012, pp. 35-38, doi:10.5755/j01.eee.120.4.1448.