Mini halogen lamp used quartz as glass shell and filled with halogen and it is smaller than halogen headlight. The mini halogen bulb is filled halogen, so it has a better luminous power and life hour than the average medium and small light bulb. The manufacture cost of mini halogen bulb is also higher than the normal vacuum bulb. Gas filled bulb is better than vacuum bulb in many different ways. The only disadvantage of gas filled is cost. Gas filled bulb can last much longer time than the vacuum one, so gas filled bulb has better cost performance. The halogen lamp is made of tungsten, but it is enclosed in a smaller quartz glass shell. Because the glass is very close to the filament, if it's made by normal glass, it will melt very easily.Looking for ideal Auto Mini Halogen Lamps Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Auto Halogen Lamps 12v 10w are quality guaranteed. We are China Origin Factory of Auto Halogen Lamps 12v 5w. If you have any question, please feel free to contact us.