Handle bulb by socket end only, DO NOT touch bulb.
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|Metal Halide Systems|
Metal halide systems are high intensity discharge (HID) lighting systems popular among many aquarium hobbyists. Metal halide lamps generate a large amount of heat and also emit ultraviolet radiation which is harmful to eyes and skin. For this reason, Metal Halide discharge lamps require special handling and care to ensure safe and proper usage.
Metal halide lamps produce the most concentrated, most intense light of any type of artificial lighting. They are ideally suited for deep freshwater planted aquariums and saltwater reef aquariums containing light-loving corals such as SPS (small polyped stony) and LPS (large polyped stony) corals and invertebrates including Tridacna clams and others. A spectacular desirable effect of metal halide lighting in your aquarium is the "glitter effect," which replicates the effect of surface waves reflecting on a reef in a natural environment.
HQI systems are relatively new to the hobby and offer many of the same features as conventional metal halide systems, but differ in design. The bulb is much smaller than screw socket halides and is double ended. Many of the ballasts for the metal halides can also be used for HQI fixtures. The HQI bulbs, however, require a system-specific socket. Wattage selections for HQI bulbs are commonly available in 150 - and 250-watt bulbs.
Tip from our Techs
Metal Halide Bulb Safety and Handling