Advance Magnetic HID Ballast Kit Ballast Start Type Probe ANSI Code M47 Metal Halide Ballast Bulb Type Number of Bulbs Supported 1 Max Bulb Watts 1 000 W Input Voltage 120 to 277V AC Input Watts 1 080 W -20 Degrees F Min Starting Temp Ballast Factor 1 Frequency 60 Hz