1 Buy = 2 Quantum 400 Watt Dimmable Ballasts!The world of indoor gardening was changed forever with the introduction of Quantum 400 Watt Ballast. A new alternative to heavy, noisy, power wasting core and coil ballasts had reached our shores. VMInnovations is an authorized Quantum dealer that sells new, warranted products!The Quantum 400 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. Therefore, the Quantum Series Lighting is the only ballast that is FULLY compliant with Part 18 of FCC rules and regulations. When you make a purchase for your garden, you are not just purchasing a random item; you are purchasing something that facilitates your passion. Great pride and care is taken in your crops, and the same pride and care has been taken by Quantum Horticulture to bring you the Quantum 400 Watt Dimmable Electronic Ballast.