1.high pressure sodium light ballasts 2. 600w digital hps ballast 3.Suitable for HPS,MH 4.CE, FCC, RoHS certific Product Description 1 ... processor for signal.3.Overload,overvoltage and short-circuit, lamp life protection.4.APFC control,PF value(0.99). 5.High ... are now working with a BV certified company 600w digital hps ballast