Philips HID Metal Halide, 175 W, ED28, Ceiling fixture, 1 pc(s), 0.409" (10.4 mm), 0.409" (10.4 mm) Philips HID Metal Halide. Bulb power: 175 W, Lamp holder: ED28, Best uses: Ceiling fixture. Quantity per pack: 1 pc(s), Package width: 0.409" (10.4 mm), Package depth: 0.409" (10.4 mm). Lamps quantity: 1 lamp(s). Package gross weight: 10.9 oz (310 g)