GE 20023 - 70 Watt - T6 - ConstantColor - Pulse Start - Metal Halide - Unprotected Arc Tube - 4200K - G12 Base - ANSI C139/M139/E - Universal Burn - CMH70TU/942/G12 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 T6 bulb, 70W, Base: G12 2-Pin, Rated Life (hours): 15000, Color Temp: 4200K, Luminous Flux (LM): 6300