metal halide ballast 400w 1.Energy saving low loss circut 2.Efficiency 96% 3.PF 0.999 4.Warrany 3 years Product Name: A metal halide ballast 400W eletronic energy savingAdvantages:1.Smart and lighter design , easy to install.2. No fan, good waterproof performance, maintenance-free 3.Soft start, constant wattage output Ballast noise rated class A 4.CE, FCC, UL, CUL, ROHS are approved5.Prolong lamp ...