GE 41826 MVR1000/U 1000 watt and higher Metal Halide Light Bulb
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 .