Philips Advance 72C5381-NP 120/277 Volt HID Lamp Ballast

The Philips Advance 72C5381-NP is a high-power factor, core-and-coil ballast designed specifically for operating one 100W metal halide lamp (M90/M140 types). This HID ballast features an HX auto-transformer design, ensuring reliable ignition and stable operation in demanding lighting applications such as commercial, industrial, and outdoor environments. It supports dual input voltages of 120V or 277V at 60Hz, making it versatile for various electrical systems. Key benefits include high efficiency with a power factor greater than 0.9, thermal protection to prevent overheating, and a compact, durable construction that withstands harsh conditions. Compared to electronic ballasts, this magnetic model offers superior surge protection and longevity in high-vibration settings, though it may consume slightly more energy and produce some audible hum. Drawbacks include the need for proper insulation and a maximum ballast-to-lamp distance of 5 feet to ensure performance. Ideal for high-bay fixtures, street lighting, or warehouse illumination, it provides consistent light output with a minimum starting temperature of -20°F (-30°C). The unit appears new in original packaging, with no visible wear, making it a cost-effective choice for replacements or new installations over less reliable generic alternatives.