Electromagnetic ballast 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 lamp HM:(high-pressure mercury vapour) discharge lamp 1) Main voltage: 220 - 240V2) Main frequency: 50 - 60Hz3) Low raise temperature4) Low power ...