Philips Advance Electronic Ballast 71A7707

The number 71A7707 refers to a high-pressure sodium (HPS) lamp ballast, specifically a core and coil kit used to operate 35W HPS lamps (S76 type) on 120V, 60Hz circuits. It is commonly used in commercial lighting applications, with suffix variations such as -001DB indicating a complete kit including capacitor and ignitor, suitable for reliable indoor and outdoor HID lighting systems.