Sold in four-packs, Warehouse-Lighting.com’s
Universal 100W metal halide ballast has a power factor of 0.9 and a minimum
start temperature of -20 degrees Fahrenheit. Operating on 120 volt to 277 volt
systems, this HID ballast offers high efficiency. Its temperature rating makes
it a good choice for warehouses and factories where high heat can be a problem.
It comes with a three-year warranty.