This Advances ballast is a post-mounted HID lighting application that maximizes ballast life, enhances ease of installation, and offers a range of safety and protection features to insure product and customer security and satisfaction. This post-line ballast operates on 120 volt systems. For use with 50 watt lamps, this magnetic HID ballast boasts a high power factor of 83%, ensuring maximum efficiency. A temperature rating of 194 degrees F makes the ballast suitable for mounting in warehouses and manufacturing facilities where high heat may be an issue. The Advance 74P5104011P postline ballasts is ideal for use with HID lamps in post-mounted applications such as lantern-type fixtures mounted on slender poles.