BHL 250 K307 250 Watt ballast. This ballast is also able to run metal halide lamps of the equivalent wattage, provided that a suitable ignitor is connected in parallel with the lamp.

BHL 400 K307 400 Watt ballast. This ballast is also able to run metal halide lamps of the equivalent wattage, provided that a suitable ignitor is connected in parallel with the lamp.