Dimming Ballast, Ballast Type Electronic Dimming, Ballast Family Hi Lume(r) 3D, Number of Lamps 2, Lamp Type T8, Lamp Length 48 In. , Voltage 120/220 to 240/277, Height 1 In. , Width 2-2/5 In. , Length 9-1/2 In. , Input Watts 68. 9/66. 3/66. 5, Number of F32T8 Lamps 2, Number of F32T8U Lamps 2, Amps 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