The melting point of tungsten wire in a halogen lamp is generally considered to be around 3420℃ (there are also claims that it is 3422℃ or 3380℃, but 3420℃ is a more common value). Tungsten is one of the most heat-resistant metals in the world, and its high melting point makes it an ideal material for making incandescent and halogen lamp filaments. In halogen bulbs, tungsten wires can emit light stably at high temperatures, and the presence of halogen gas can effectively slow down the evaporation rate of tungsten wires, thereby extending the service life of the bulb.
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