LumaPro(R), Magnetic, HID Ballast Kit, Ballast Start Type Pulse, ANSI Code M136, Metal Halide Ballast Bulb Type, Number of Bulbs Supported 1, Max. Bulb Watts 200 W, Input Voltage 120 to 277V AC, Input Watts 227 W, -20 Degrees F Min. Starting Temp., Ballast Factor 0.97, Frequency 60 Hz