Dimming Ballast, Ballast Type Electronic Dimming, Ballast Family Hi Lume(r) 3D, Number of Lamps 2, Lamp Type T8 and U Bent, Lamp Length 48 In., Voltage 120-277, Height 1 In., Width 2-3/8 In., Length 9-1/2 In., Input Watts 68.4/67.2/66.5Number of F32T8 Lamps 2, Number of F32T8U Lamps 2Amps AC 0.57/0.28/0.24, Start Type Programmed Rapid, Min. Starting Temp. 50 Degrees F, Dimming Range 118 Percent to 1 Percent, Ballast Factor 1, Power Factor Greater Than 0.95 Lutron Electronic Dimming BallastsHi-lume 3DDimming ballasts save energy while providing smooth, continuous, ultra-quiet dimming.UL Listed and CSA Certified.Dimming to