... Hz. 3) Low raise temperature. 4) Low power consumption. 400w magnetic ballast for metal halide lamp and sodium lamp CodeWattLamp typeCurrent ... /40TLB400400MH/HPS3.25 / 4.6220-240V/50Hz0.4232/50Detailed Product Description.Electromagnetic ballasts for metal halide lamp,sodium lamp,mercury ... ) Providing long service life and super quietness.6) Low magnetic leakage.7) Watts:35W,50W,70W,100W,125W,150W,250W ...