HID Corn W/Ballast
HID LED Replacement With Ballast. Plug-and-Play LED Replacement for a Metal Halide Lamp. This lamp works with your metal halide ballast. 2 ways to install: (1) Bypass ballast and directly connect to 120V AC; (2) Use with existing HID ballast (WARNING: HID ballast consumes electricity when the switch is on. For best energy-saving results, ballast should be bypassed.) Ideal for retrofitting existing HID highbay, shoebox, flood light, or wall pack fixtures and can be used in enclosed luminares.