STANDARD BMH0250 QUADTAP CWA STD Ballast is a 250-watt metal-halide ballast designed as a QUADTAP (four-tap) unit for 120/208/240/277 V AC supply. It uses a magnetic core-and-coil construction with a CWA (Constant Wattage Auto-transformer) circuit and carries the ANSI M58 ballast designation; the STD suffix indicates the standard mounting variant. Suitable for commercial and industrial luminaires, this ballast drives 250 W metal-halide lamps at 60 Hz with multi-voltage compatibility across common line voltages.
