- noun a light bulb containing a halogen that runs at a much higher temperature than a conventional incandescent lamp
- A gas-filled lamp containing a small proportion of one or more halogens.
- A halogen lamp (1) whose contained gas is iodine, or that of another halogen or mixture of halogens, and whose filament is composed of tungsten. The gas in these high-efficiency lamps reacts with the tungsten metal which evaporates, recycling the particles back onto the filament surface. Also called tungsten-halogen lamp.
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