000-watt Quartz Metal Halide High Intensity Discharge (HID) light bulb. It belongs to the multi-vapor line. Wattage: 1000WANSI Code: M47 (Requires an M47 ballast to operate safely) Base Type: E39 Mogul Screw (39mm diameter extra-large base) Burn Position: Universal (U), meaning it can be operated base-up, base-down, or horizontally. Brightness Output: Between 100,000 and 108,000 initial lumens depending on the exact burning angle. Color Temperature: Typically, 3700K to 4000K, giving off a crisp white light.