... 100% FCC,CE,UL 600W Dimmable Electronic Ballast for HPS/MH lamphorticulture; hydroponic; ballast; electronic ballast Our products have been approved ... . We are light power supplier for EXPO Shanghai10. Annual output: More than 500,000pcs electronic ballastsHPS seriesHPS70W, HPS150W, HPS250W, HPS400W ... MH400W, MH600W, MH1000W,MH200W-AC110V (WARM BOOT) 600W Dimmable Electronic Ballast for HPS/MH lamp