LumaPro(R), Magnetic, HID Ballast Kit, Ballast Start Type Pulse, ANSI Code M98, Metal Halide Ballast Bulb Type, Number of Bulbs Supported 1, Max. Bulb Watts 70 W, Input Voltage 120 to 277V AC, Input Watts 85 W, -20 Degrees F Min. Starting Temp., Ballast Factor 0.97, Frequency 60 Hz