... short protectionavaliableCCF<1.7Open circuit protectionavaliableUsage temperature -40 to 55CIgnition failure protectionavaliable Prolong lamp lifespan at least 10 ... %Good regulation against supply voltage variationEnergy-saving up to 30% compared with magnetic ballastConstant wattage outputBallast noise ... FCC, UL, CUL, ROHS are available.Ballast can use to MH and HPS lamp from 35w,70w,100w,150w,250w ...