Apollo Horticulture Elite Series Double Ended 1000w Watt 240V Hydroponic HPS MH Digital Dimmable Ballast for Plant Growing Package Includes: 1 - Apollo Horticulture Elite 1000w Double Ended Ballast Input: 220V-240V / 50-60Hz / THD: &lt;10% / Imax: 4.3 A / Dimmable Options: 100%, 75% and 50% Double Ended Ballasts paired with Double Ended Bulbs will improve yields with its new super high output technology and more efficient light disbursement. Extremely low heat dissipation for a more controlled and cooled grow environment. Compact to be moved anywhere for a more organized grow room. 240V cord will allow for twice the current carrying capacity with less resistance, allowing the ballast to run to is maximum efficiency. **Ballast is only compatible with 1000w Double Ended HPS and MH Bulbs**