The halogen light bulb or lamp is a type of incandescent lamp which uses a halogen gas in order to increase both light output and rated life. They are known for moderately high efficiency, quality of light, and high rated life compared to regular incandescent lamps.
Halogen lamps are used in a variety of applications, both commercial and residential. Halogen lamps are used in automotive headlamps, under-cabinet lighting, and work lights. In addition, halogen reflectors like MR and PAR lamps are often preferred for directed lighting such as spotlights and floodlights. They are also increasingly being used as a more efficient alternative to incandescent reflectors. There are not many situations in which halogen lamps cannot be used, but one potential downside is the heat generated by halogen lamps, particularly in areas where HVAC costs are a concern.