Ushio 5002093 - UHI-S250AQ/20/CWA 250 watt Metal Halide Light Bulb HID Bulbs produce high output for their size making them a compact powerful &amp; efficient light source HID Bulbs are used for general lighting, professional lighting fixtures, growing applications HID bulbs put out around 3-5 times greater output (lumens per watt) than traditional halogen bulbs Ushiobulb, 250W, Base: E39 Mogul Screw, Rated Life (hours): 8000, Color Temp:20000K+, Luminous Flux (LM): 5000