Since the halogen bulb needs to work at a higher temperature, the ordinary glass envelope will melt and flow at this temperature. Due to the extremely low coefficient of thermal expansion, fused quartz glass (English: Fusedquartz) is used instead of ordinary glass for halogen. In the bulb, since ordinary glass can block ultraviolet light, but quartz glass cannot, the halogen bulb emits invisible light having an ultraviolet band. The two sides of things are fully reflected here: on the one hand, we need to add protective measures to the bulbs to reduce the radiation of ultraviolet rays. On the other hand, we also use UV lamps to treat certain skin diseases or to get exposed to the sun indoors. To get the bronze skin.

Halogen lamps are based on the characteristics of quartz glass. If the wall of the glass tube is contaminated with oil (for example, by touching the glass bulb of the bulb), the above regeneration cycle will not be completed well, which will greatly affect the life of the bulb and need to be removed by alcohol.

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