1.Own R&D, manufacturer 2.Small and light, easy delivery 3.High efficiency of 99% 4.PF>0.99 5.All-sided protection Product Name: A Good quality & price 250W HPS electronic ballastOur product advantages: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 ...