GE 24048 - HR175A39 Mercury Vapor 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 GE ED28 bulb, 175W, Base: E39 Mogul Screw, Rated Life (hours): 24000, Color Temp: 5700K, Luminous Flux (LM):