... consumption6.Constant output of power: Constant output of power and light when voltage variesbetween -15%~+15%of ratin voltage7.Protection ... CE, GS, TUV, EMC, ROSH,ULSuitable Bulbs 600W HPS/MH bulb of America and Europe standard Dimension A :410mm B: 97mm ... connecting method(Height,Distance for reference only) We do HPS grow light kit for 14 years, joined in many international fairs, communicated ...