... 3.PF>0.99 4.3 years warranty Product Name: A energy saving electronic ballast 150W hpsAdvantages: 1.Smart and lighter ... 3.Soft start, constant wattage output Ballast noise rated class A 4.CE, FCC, UL, CUL, ROHS are approved5.Prolong lamp ... %Efficiency 96.5%Current Crest Factor<1.5Internal Fan WithoutApplication: A energy saving electronic ballast 150W hps