Hydroplanet Hydroponic 400-watt Metal Halide Bulb MH Grow Light Bulb Lamp (MH, 400w)&iexcl;&shy; Vegetative growth and leaf production Lifetime 12000 Hours Improved Lamp Life and Lumen Output, 110V power voltage Color temperature: 6,500K Long service life with high lumen output and low energy consumptio Designed for both Magnetic and Digital Ballasts