... .Electromagnetic ballasts for metal halide lamp,sodium lamp,mercury lamp 35W,70W,125W,150W,250W,400W,600W,1000W,2000W.Electromagnetic ballasts ... service life and super quietness.6) Low magnetic leakage.7) Watts:35W,50W,70W,100W,125W,150W,250W,400W,600W,700W,1000W ...