... voltage:220V-240V. 2) Main frequency:50-60 Hz. 3) Low raise temperature. 4) Low power consumption. 400w magnetic ballast for metal ... for metal halide lamp,sodium lamp,mercury lamp 35W,70W,125W,150W,250W,400W,600W,1000W,2000W.Electromagnetic ballasts for HID lamps.For ... HS:(high-pressure sodium) discharge lamp; MH:(high-pressure metal halide) discharge ...