... life and super quietness 4Certificate:CE 250W Magnetic Ballast , ballast and ignitor 250w, magnetic ballast 220v/50hz, electronic ballast 250w Electromagnetic ballasts for metal halide ... ,125W,150W,250W,400W,600W,1000W,2000W Electromagnetic ballasts for HID lamps.For HS:(high-pressure sodium) discharge lamp; MH ... ,2000W7) Suitable for various kinds of products8) Certificate: CE. Magnetic Ballast 600W