Magnetic ballast for high pressure sodium lamp, metal halide lamp & mercury lamp ... , 50W, 70W, 80W, 100W, 125W, 150W, 250W, 400W, 600W, 1000W, 2000W All of the silicon steel sheets used for electromagentic ballasts ... quality and beautiful appearance.Certificates: TUV, CE, RoHS Metal halide ballast