Lithonia Lighting GT4 MV 4 Light Electronic Troffer Mvolt Ballast, 2' x 4', 32 WattsHighlights: Size: 2' x 4' 32 watts Low profile static luminaire provides general illumination for recessed applications, ideal for restricted plenum spaces Designed exclusively for use with T8 lamps, electronic ballast and sockets Smooth hemmed sides and smooth, inward formed end flanges for safe handling Standard ballast is electronic, thermally protected, resetting, Class P, HPF, non PCB, UL listed, CSA certified ballast, universal voltage and sound