Lighthouse Hydro Revolt 1000W HPS / MH Digital Dimmable Ballast for Grow Lights Switchable Dimmable HPS/MH Digital Ballast Produces 30% more light than a core and coil ballast. 9% more PAR than 1000w CAP Nextgen UL Listed Dimmable (Run ballast at 50%, 75%, or 100% power savings)