TY JOUR TI SPECTRAL COMPOSITION ANALYSIS OF THE CURRENT AND VOLTAGE OF LED AND GAS-DISCHARGE LIGHT SOURCES KW electric power quality KW light sources KW nonlinear load KW highest harmonic components JO Bulletin of KSAU AU Boyarskaya, N.P. AU Temerbaev, S.A. AU Dovgun, V.P. AU Kabak, A.L. AU Kolmakov, V.O. PY 2013 IS PB Krasnoyarsk State Agrarian University