Dimming Ballast, Ballast Family EcoSystem(R), Number of Lamps 1, Lamp Type T4, Voltage 120/220 to 240/277, Height 1 In., Width 3 In., Length 4-9/10 In., Input Watts 43.2/42.9/42.7/42.6, Amps AC 0.36/0.20/0.18/0.15, Start Type Programmed Rapid, Min. Starting Temp. 50 Degrees F, Dimming Range 100 Percent to 5 Percent RLO, Ballast Factor 0.95, Power Factor Greater Than 0.95, Total Harmonic Distortion Less Than 10 Percent, Sound Rating Inaudible In 27dBa Ambient Environment