... Hz. 3) Low raise temperature. 4) Low power consumption. 400w magnetic ballast for metal halide lamp and sodium lamp CodeWattLamp typeCurrent(A ... .5) Providing long service life and super quietness.6) Low magnetic leakage.7) Watts:35W,50W,70W,100W,125W,150W,250W ... wire,silicon steel sheet.10) TW:13011) Certificate: CE. 400w ballast magnetic ballast for metal halide lamp