... : CE, GS, TUV, EMC, ROSH,ULSuitable Bulbs 600W HPS/MH bulb of America and Europe standard Dimension A :410mm ... 4.This product must be equipped with right HPS and MH lamps as to get higher efficiency, safety ... -10~+40°C7.In order to avoid shaking, Digital Ballast should be fixed well. Any falling can cause ... method(Height,Distance for reference only) We do HPS grow light kit for 14 years, joined in ...