A concept of using LED lamps in conjunction with traditional light sourcesMilaševski, Irena; Armas, Jelena; Teemets, Raivo10th International Symposium "Topical Problems in the Field of Electrical and Power Engineering”. Doctoral School of Energy and Geotechnology II : Pärnu, Estonia, January 10-15, 20112011 / p. 238-241 : ill