Virtual Sun VSD1000WDS 1,000-Watt Dimmable MH/HPS Digital Grow Light Kit Includes (1) - 1000 watt high pressure sodium bulb - 125,000 lumens high output - color temperature: 2,100k - avg. life 20,000 - 24,000 hours Includes (1) - 1000 watt metal halide bulb - 110,000 lumens high output - avg. life 10,000 hours Both bulbs increase light output by 10% over standard bulbs = 10 % more plant growth. 30% more blue/violet provides better range for your plant. Digital dimmable ballast Includes timer and adjustable hanger system