Industrial 79W6091001 Outdoor Weatherproof Ballast

Philips Advance Outdoor Weatherproof Ballast 79W6091001 is a 400-watt metal-halide ballast designed for outdoor lighting fixtures. It accepts a 120/208/240/277 VAC, 60 Hz supply and provides reliable current regulation for 400W metal-halide lamps, ANSI code M59. Encased in an outdoor weatherproof (Quad WP) housing, the unit is built to withstand exposure to the elements in wet locations while delivering consistent illumination. As part of the Philips Advance line, this ballast helps outdoor luminaires achieve stable starting characteristics and efficient operation typical of high-intensity discharge systems. Intended for fixtures that specify 400W MH lamps with ANSI M59 compatibility and the 120/208/240/277V supply range, this ballast is suitable for applications such as parking areas, roadways, building façades, and other outdoor area lighting where 400W MH performance is required. When selecting a ballast, confirm fixture compatibility with the 79W6091001 model, ensure the operating voltage aligns with the supply, and follow all safety and installation guidelines for outdoor HID equipment.