... different wattage bulbsKey Word: Electronic Ballast, Dimmable Electronic Ballast, Grow Light Ballast 400W, Hydroponic grow ballast 400w, electronic ballast 400w, 110V, UL Listed1 ... Outstanding energy-saving effect A) Low power loss B) High power factor C) High lighting efficiency 2 ... monitoring function A) Built-in voltage monitoring function B) Trouble-detecting protection function 3) Dimming, ...