B8580 New HID Internal Ballast Made to be Universal for 12 or 24 Volt SystemsOne New Aftermarket Replacement HID Internal Ballast Universal for 12 or 24 Volt Systems This aftermarket replacement HID (High Intensity Discharge) internal ballast is a direct fit replacement for the WL8500 E, WL8500 F, and WL8500 P series HID work lights used across agricultural, construction, and forestry equipment. The ballast regulates electrical current and converts low voltage DC power into the high voltage output required to ignite and