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The change of car technology is inseparable from the eye of the car -- the lighting system. We can access halogen lamps, xenon lamps, LED and laser headlights. Of course, LED and laser headlights are far away from most consumers, and most of them are halogen lamps and xenon headlights. Many people will have the question that xenon lamps are more advanced than halogen lamps. Why do many models still use xenon lamps for low beam lamps and halogen lamps for high beam lamps? Today we will talk about this topic.
Let's first look at the advantages and disadvantages of halogen lamps and xenon lamps.
Halogen lamp
Halogen lamp is improved from tungsten filament lamp or incandescent lamp. It has been widely used in automobiles for more than 50 years since its invention in 1959, mainly because it has the advantages of simple workmanship, low cost and good color rendering.
However, under the same power, the brightness of halogen lamp is only 1.5 times higher than that of incandescent lamp, and its service life is 2-3 times of that of incandescent lamp. With the continuous improvement of vehicle quality and technology, the defects of short service life and luminous rate of halogen lamp have not been improved, or the technology of halogen lamp has reached the bottleneck.
Xenon lamp
Xenon headlamp is a new technology different from halogen lamp. Its principle is to use high voltage ionization xenon to generate light source. Its luminous efficiency and brightness are twice as high as that of halogen lamp. Besides, it has no traditional filament, no short and brittle defects, and its service life is increased by 4 times. In addition, xenon headlights have the advantages of strong electricity saving (only 40% of halogen, etc.), relatively high color temperature, and close to sunlight effect
However, the first disadvantage of xenon headlights is their relatively high cost. In addition to the manufacturing cost of light sources, they also depend on the quality of the lens. Good imported lenses often determine the lighting effect of xenon headlights. Low quality lenses will cause deviation in the irradiation range or weak brightness and other consequences.
The second disadvantage is that the starting time is long. It takes 3-4 seconds to reach the rated brightness after the xenon headlights are turned on. This is why many models are equipped with xenon headlights, but they are only used on the low beam lamps. The high beam lamps still use halogens. Because the high beam lamps are often used to flash for a short time to remind the car ahead, the delay characteristics of the xenon lamps are not suitable. Of course, there is no solution. Some models also use high beam and low beam headlights to reflect the low beam light higher and farther by using reflectors to replace the working procedure of high beam xenon lamps.
Headlamp set with xenon low beam lamp and halogen high beam lamp
In addition, the light of xenon headlights is greatly affected by the environment. For example, in a low color temperature environment (generally yellow light, such as street lamps), the light of xenon headlights with high color temperature will be covered by low color temperature, and the lighting effect will be reduced; For another example, in the haze weather with low visibility, the xenon lamp with high color temperature will diffuse with the fine particles suspended in the air, causing a white effect in front of you, which is a great threat to safety. At this time, the ordinary halogen lamp has a better penetration advantage, which is also a major reason for using halogen for high beam and xenon for low beam - better adaptability.
Another point is the impact on the driver of the opposite vehicle. The lighting effect of xenon headlights is indeed much better than that of halogen lamps under normal circumstances. However, xenon high beam lamps are undoubtedly more "lethal" to the human eyes, which can make people blind for a short time. It is a major hidden danger of traffic safety. For example, in Europe, xenon lamps are explicitly prohibited to be used for high beam lamps. There is no such use regulation in China, so the owners of some high beam lamps that are xenon lamps must use them carefully according to the regulations.
The change of car technology is inseparable from the eye of the car -- the lighting system. We can access halogen lamps, xenon lamps, LED and laser headlights. Of course, LED and laser headlights are far away from most consumers, and most of them are halogen lamps and xenon headlights. Many people will have the question that xenon lamps are more advanced than halogen lamps. Why do many models still use xenon lamps for low beam lamps and halogen lamps for high beam lamps? Today we will talk about this topic.
Let's first look at the advantages and disadvantages of halogen lamps and xenon lamps.
Halogen lamp
Halogen lamp is improved from tungsten filament lamp or incandescent lamp. It has been widely used in automobiles for more than 50 years since its invention in 1959, mainly because it has the advantages of simple workmanship, low cost and good color rendering.
However, under the same power, the brightness of halogen lamp is only 1.5 times higher than that of incandescent lamp, and its service life is 2-3 times of that of incandescent lamp. With the continuous improvement of vehicle quality and technology, the defects of short service life and luminous rate of halogen lamp have not been improved, or the technology of halogen lamp has reached the bottleneck.
Xenon lamp
Xenon headlamp is a new technology different from halogen lamp. Its principle is to use high voltage ionization xenon to generate light source. Its luminous efficiency and brightness are twice as high as that of halogen lamp. Besides, it has no traditional filament, no short and brittle defects, and its service life is increased by 4 times. In addition, xenon headlights have the advantages of strong electricity saving (only 40% of halogen, etc.), relatively high color temperature, and close to sunlight effect
However, the first disadvantage of xenon headlights is their relatively high cost. In addition to the manufacturing cost of light sources, they also depend on the quality of the lens. Good imported lenses often determine the lighting effect of xenon headlights. Low quality lenses will cause deviation in the irradiation range or weak brightness and other consequences.
The second disadvantage is that the starting time is long. It takes 3-4 seconds to reach the rated brightness after the xenon headlights are turned on. This is why many models are equipped with xenon headlights, but they are only used on the low beam lamps. The high beam lamps still use halogens. Because the high beam lamps are often used to flash for a short time to remind the car ahead, the delay characteristics of the xenon lamps are not suitable. Of course, there is no solution. Some models also use high beam and low beam headlights to reflect the low beam light higher and farther by using reflectors to replace the working procedure of high beam xenon lamps.
Headlamp set with xenon low beam lamp and halogen high beam lamp
In addition, the light of xenon headlights is greatly affected by the environment. For example, in a low color temperature environment (generally yellow light, such as street lamps), the light of xenon headlights with high color temperature will be covered by low color temperature, and the lighting effect will be reduced; For another example, in the haze weather with low visibility, the xenon lamp with high color temperature will diffuse with the fine particles suspended in the air, causing a white effect in front of you, which is a great threat to safety. At this time, the ordinary halogen lamp has a better penetration advantage, which is also a major reason for using halogen for high beam and xenon for low beam - better adaptability.
Another point is the impact on the driver of the opposite vehicle. The lighting effect of xenon headlights is indeed much better than that of halogen lamps under normal circumstances. However, xenon high beam lamps are undoubtedly more "lethal" to the human eyes, which can make people blind for a short time. It is a major hidden danger of traffic safety. For example, in Europe, xenon lamps are explicitly prohibited to be used for high beam lamps. There is no such use regulation in China, so the owners of some high beam lamps that are xenon lamps must use them carefully according to the regulations.
