GE 41826 MVR1000/U 1000 watt and higher Metal Halide Light Bulb Ideal for general purpose Lighting commonly used for residential and commercial applications Average life: 9000 hours Color Temp: 3700 kelvin Color rendering index: 65 It is GE MVR1000/U 1000W Quartz Metal Halide Light Bulb BT56 Bulb Shape Mogul Base 100 000 Lumens Horizontal Or 108 000 Vertical 4 000 Kelvins Color Temperature Requires Separate Ballast Boxed