Advance HID Ballast, F-Can Magnetic, Metal Halide Lamp, 150 W Lamp, 180 W Wattage, 120/277 VAC, 1.5/0.75 A, 60 Hz Frequency, Pulse Start, -40 deg F Minimum Starting, Power Factor: 0.9, 1 Lamp, 72C5482 Lamp Base, Ballast Factor: 1, ANSI M102/M142 Ballast Grade, Metal, 12 in L x 2.6 in W x 3.9 in H Dimensions