From a technical point of view, the current vehicle is equipped with headlights are mainly two kinds of halogen and xenon lamps; of course, today there are still a lot of start-Class models equipped with the ordinary incandescent lamp is more expensive, but because of its technology is too too old, and in danger of being eliminated the first two trends, so this will no longer be introduced.
Halogen start applying to the body of the vehicle began in 70 years, its principles and ordinary incandescent light is very similar, namely through the spiral tube in the heat after the tungsten filament light, its luminous intensity by the melting point of tungsten own restrictions.
In general, to improve the brightness of halogen tungsten not only to increase the resistance of a few, but the melting point of tungsten is also must be improved. Tungsten halogen lamps due to have a higher melting point than ordinary incandescent lamp, so brightness greater than the latter (incandescent light).