The world of indoor gardening was changed forever with the introduction of the Quantum 1000 Watt 120/240V Ballast. It's a great alternative to heavy, noisy, power-wasting core and coil ballasts. Quantum Series Lighting is the only ballast that is fully compliant with Part 18 of FCC rules and regulations. The Quantum 1000 Watt Dimmable Electronic Ballast device has gone through rigorous testing in lab facilities that replicate the most extreme atmospheric conditions. This ballast can withstand the high heat and humidity that any garden can throw at it. It can be run at 100%, 75% or 50% power, and it can strike both metal halide and high-pressure Sodium bulbs.