... .ISO9001 certified 1. magnetic ballast for Metal halide,sodium lamps 2.70w-400w,220-240V/50-60HZ 3.Shape(HXW ... ,used for high-pressure sodium lamps(SVB) and metal halide vapour lamps(MHB) and high-pressure mercury lamps(MVB).Vacuum-pressure white thermosetting ... ensure a durable lifetime.For mercury vapour lamps(HM),high-pressure sodium lamps(HS)and metal halide lamps(MH).Mains Voltage:220V,230V, ...