What is in a halogen lamp?
Halogen lamps last longer than traditional light bulbs because of the halogen gases used inside them, which protect the filament. Halogen lamps are commonly used as vehicle headlights as well as in reading lamps and a variety of other lighting fixtures.Halogen GasHalogen gases, like iodine and bromine, are used inside a halogen lamp to increase the efficiency of the bulb. The gases give the lamp a life two or three times longer than that of a traditional light bulb.FilamentLike a traditional bulb, a halogen lamp contains a tungsten filament. When the lamp is on, the filament is heated to high temperatures that wear it down gradually.TungstenTungsten atoms evaporate when the filament is heated. The halogen gases combine with the tungsten atoms and redeposit them on the filament, so the tungsten is recycled.Quartz EnvelopeThe halogen gas and tungsten filament are located in a quartz envelope. The filament is closer to the envelope than is the case with a glass bulb, making the evaporatio
