1.Designed for greenhouse 2.230v 600w 3.Completely silent 4.Approval: CE, GS, ... output of power: Constant output of power and light when voltage variesbetween -15%~+15%of ratin voltage7 ... : CE, GS, TUV, EMC, ROSH,ULSuitable Bulbs 600W HPS/MH bulb of America and Europe standard Dimension A ... method(Height,Distance for reference only) We do HPS grow light kit for 14 years, joined in many international ...