Ballast Type: HID, Magnetic; Lamp Type: Metal Halide; Lamp Watts: 175W; Lamp Starting Method: Pulse; Circuit: CWA; Voltage: 120/277/347V AC; Power Factor: 0.90; Ballast Factor: ; ANSI Code: M57/H39; Min Temp - deg F: -20°F (-29°C); Packaging: 217; Dimensions: 2.83 in. L x 4.33 in. W x 3.94 in. H; Enclosure: BL