... sodium lamp, metal halide lamp & mercury lamp 35W-1000W Magnetic ballast for high pressure discharge lampVoltage: 220-240VFrequency: 50/60HzPower: 35W, 50W, ... the silicon steel sheets used for electromagentic ballasts are of extra good quality and made under high speed press. The products ... beautiful appearance.Certificates: TUV, CE, RoHS VS 1000W magnetic ballast for metal halide lamp and mercury lamp