Halogen headlight
Halogen headlights are a common type of lighting configuration. The working principle is to inject halogen gas such as iodine or bromine into the bulb. At high temperature, the sublimated tungsten wire and the halogen chemically act. The cooled tungsten will re-solidify in the tungsten wire. On top, a balanced cycle is formed to avoid premature rupture of the tungsten wire. Therefore halogen bulbs are longer than incandescent lamps.
Xenon headlights
Xenon headlights are currently used less and are gradually being replaced by LED headlights. Its working principle is to use the matching electronic ballast to instantly raise the 12V voltage of the car battery to the trigger voltage above 23KV, ionize the xenon gas in the xenon headlights to form an arc discharge and make it stably illuminate, providing stable car headlight illumination. system.
As the cost of LED headlights continues to decrease, more and more car companies are beginning to carry them on their own models. Compared with halogen headlights and xenon headlights, the main advantages of LED headlights: energy saving, LED energy consumption is equivalent to 1/20 of halogen headlights; long life, LED life is about 50,000 hours, and xenon headlights are 3000 About hours; small size, can meet the modeling requirements of car manufacturers. In addition, LED headlights have many advantages such as good durability, fast response, and low brightness attenuation.
Laser headlight
Laser headlights have been invented in recent years. At present, there are fewer manufacturers of laser headlights, mainly equipped with high-end models of Audi and BMW. Laser headlights have higher brightness than LED headlights. LED headlights have a luminous intensity of 100 lumens per watt, while laser headlights can reach 170 lumens per watt. In addition, the laser headlights also have the advantages of long irradiation distance, small volume, and energy saving. However, laser headlights generally need to be used together with LED headlights, because laser headlights have a long range of illumination, but the range is limited, requiring LED headlights to supplement.
