Loadstar 600W Dimmable Digital Ballast carbon filter the product features thermal protection Bowl Trimmer the product features thermal protection to prevent overheating and an IP44 rated terminal box A set of wholly original under trays designed for use with fabric pots to automatically deliver water to eliminate the need for active irrigation Upgrade your ballast from magnetic to digital and experience more consistent light output and reduced running costs These 600w digital ballasts from Loadstar are adjustable from 250w up to 660w allowing you to change the light intensity depending on the stage of growth or dim them down during the hottest part of summer