71A6092-001D 400 Watt – Pulse Start – Metal Halide Ballast. The Advance 71A6092-001D metal halide ballast features a 4-tap voltage input for compatibility from 120 to 277 volts. For use with 400 watt lamps, this magnetic HID ballast boasts a high power factor of 90%, ensuring maximum efficiency. A temperature rating of 221 degrees F makes the ballast suitable for mounting in warehouses and manufacturing facilities where high heat may be an issue. Includes dry capacitor, ignitor and bracket kit.