Editing Metal-halide lamp (section)

==Uses==
Metal-halide lamps are used for general lighting purposes both indoors and outdoors, such as commercial, industrial, and public spaces, parking lots, sports arenas, factories, and retail stores, as well as [[residential security]] lighting; automotive and specialty applications are further fields of usage. 
 
Metal-halide lamps are used in automobile [[headlamp|headlights]], where they are commonly generically called [[Headlamp#High-intensity discharge (HID)|"xenon headlamps"]] due to the use of [[xenon]] gas in the bulb, to provide minimal light upon turning on before the lamp warms up, instead of the [[argon]] typically used in other halide lamps.

Another widespread use for such lamps is in [[photographic lighting]] and [[stage lighting]] fixtures, where they are commonly generically known as MSD or HMI lamps and are generally used in 150, 250, 400, 575 and 1,200 [[watt]] ratings, especially [[intelligent lighting]].

Because of their wide spectrum and good efficiency they were used for indoor growing applications, specifically cannabis, and were quite popular with reef [[aquarist]]s who needed a high intensity light source for their corals.<ref name="venturelighting">{{cite web|url=http://www.venturelighting.com/techcenter/metal-halide-techintro.html|title=Metal Halide|publisher=Venture Lighting|access-date=2012-12-14|archive-url=https://web.archive.org/web/20120215041921/http://www.venturelighting.com/techcenter/metal-halide-techintro.html|archive-date=2012-02-15|url-status=dead}}</ref><ref>{{cite web | url=https://cannabisindustryinstitute.com/news/metal-halide-bulbs-workhorses-of-the-industry/ | title=Metal Halide Bulbs: Workhorses of the Industry }}</ref> However LEDs have almost entirely replaced metal halide in both applications, with just a handful of purists still holding on.<ref name="Reed Stable">{{cite web | url=https://reefstable.com/guides/saltwater-aquarium-lighting-guide/#led-lighting | title=Saltwater Aquarium Lighting Guide}}</ref>