Electronic Ballast, Ballast Type Electronic, Ballast Start Type Instant, Ballast Lamp Type T8, Ballast Family UltraMax G Series, Ballast Max. Number of Lamps 2, Ballast Voltage 120/277, Light Output Low, Min. Starting Temp. 0 Degrees F, Amps AC 0.43 to 0.19, Input Watts 50 to 51, Ballast Max. Lamp Watts 32, Ballast Dimming No, Ballast Factor 0.77, Power Factor Greater Than 0.98, Total Harmonic Distortion Less Than 10 Percent, Length 9-1/2 In., Width 1-5/16 In., Height 1-3/16 In.