Advance Magnetic HID Ballast Kit Ballast Start Type Pulse ANSI Code M149 Metal Halide Ballast Bulb Type Number of Bulbs Supported 1 Max Bulb Watts 750 W Input Voltage 120/208/240/277/480V AC Input Watts 818 W -20 Degrees F Min Starting Temp Ballast Factor 1 Frequency 60 Hz