... service life and super quietness 4Certificate:CE Magnetic Ballast 220v/50hz 110v/60hz , magnetic ballast circuit ,70w Magnetic Ballast, 70w hid ... rise, noiseless, little magnetism leakage, long lifetime 3) The lamp can start quickly and have soft stable light 4. Materials: Copper ... wire , silicon steel sheet 5) Working voltage: 220 - 240V, 50 / 60Hz 6) Power: Available at 35W,70W,125W,150W,250W,400W ...