halogen lamp


halogen lamp
a gas-filled, high-intensity incandescent lamp having a tungsten filament and containing a small amount of a halogen, such as iodine, that vaporizes on heating and redeposits any evaporated tungsten particles back onto the filament: used esp. in motion-picture projectors and automobile headlights.

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or tungsten-halogen lamp

Incandescent lamp with a quartz bulb and a gas filling that includes a halogen.

It gives brilliant light from a compact unit. The halogen combines with the tungsten evaporated from the hot filament to form a compound that is attracted back to the filament, thus extending the filament's life. The evaporated tungsten is also prevented from condensing on the bulb and darkening it, an effect that reduces the light output of ordinary incandescent lamps. First used in the late 1960s in motion-picture production, halogen lamps are now also used in automobile headlights, underwater photography, and residential lighting.

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Universalium. 2010.

Look at other dictionaries:

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  • halogen lamp — hal′ogen lamp n. mot elm ene a gas filled, high intensity incandescent lamp containing a small amount of a halogen, as iodine …   From formal English to slang

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  • halogen lamp — incandescent lamp which contains a small amount of halogen …   English contemporary dictionary

  • halogen lamp — a gas filled, high intensity incandescent lamp having a tungsten filament and containing a small amount of a halogen, such as iodine, that vaporizes on heating and redeposits any evaporated tungsten particles back onto the filament: used esp. in… …   Useful english dictionary

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