Our metal halide fish tank lighting systems are available in five different lengths that are designed to fit most size fish tanks. These 150w systems come with either one, two or three halide bulbs (determined by light length) and are also fitted with T5 bulbs and LED's. These aquarium halide lighting systems are run by high quality external ballasts that help reduce the risk of the ballasts blowing due to overheating. Suspended from your ceiling or from a suspension system (not supplied) these are perfect for supplying high output lighting to your marine fish tank aquarium.