Electronic Dimmable Ballast 1000W for MH/HPS 1. Has a 99.9% power factor 2. 3- ... warranty 3. CE & UL certified Electronic Dimmable Ballast 1000W for MH/HPSKey Word: Electronic Ballast, Dimmable Electronic Ballast, Grow Light Ballast ... ) Fast start-up, reach full brightness quickly 6) Operate HPS & MH lamps. 7) Available in 220-240V and 110-120V,8 ...