them safe, so the halogen bulbs are usually been used as headlight. Halogen bulb can generate more light and has better working life hours. The supply voltage of halogen lamp is usually divided into ac 220V and dc 12V and 24V. The halogen lamp is made of tungsten, but it is enclosed in a smaller quartz glass shell. Normally, the halogen bulb will create ultraviolet when light, so we must use quartz coating to prevent head lamp been damaged by the ultraviolet generated by halogen bulb. To generate more light, the filament be heated to the very high temperature, so halogen bulb is hotter than a normal bulb.Looking for ideal Auto Headlight Bulbs 48w Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Auto Headlight Lamps 36w are quality guaranteed. We are China Origin Factory of Car Headlight Bulbs 24v. If you have any question, please feel free to contact us.