UltraMax(R), Electronic, Fluorescent Ballast, Ballast Start Type Instant, Input Voltage 347V AC, Number of Bulbs Supported 1, 2, Max. Bulb Watts 48 W, Ballast Bulb Type T12, T8, Dimming No, Dimming Type No Dimming, Dimming Method No Dimming, Dimming Range No Dimming, CA Title 20 Compliant No, Min. Starting Temp. -20 Degrees F