Virtual Sun VS600WRDS 600-Watt Grow Light Kit With Digital Ballast Includes (1) - 600 watt high pressure sodium bulb - 90,000 lumens high output - color temperature: 2,100k - avg. life 20,000 - 24,000 hours Includes (1) - 600 watt metal halide bulb - 60,000 lumens high output - color temperature: 4200k - 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 ballast ballast is 120/240v, but comes with a 120v cord Includes timer and adjustable hanger system