It took only 10 years for car lights to go from halogen, xenon to LED, and now laser headlights and pixel OLED headlights have begun to appear.

Although car headlights continue to evolve, this technological development seems to be time to stop for many 100,000 yuan entry-level family cars. The tungsten bulbs that have been used for decades have low cost, low color temperature and low brightness. Many car owners scoffed at the name "candle light"

There are too many cases where you can instantly upgrade your headlights to "high-end LED" for hundreds of yuan. However, problems have also arisen. After a year or so, I found that the brightness dropped sharply, and some even experienced blindness.

A few hundred dollars will be punished by the traffic police even if you lose money in an instant. Why is the self-modified LED light easily attenuated?

In the old days when we were still using incandescent and fluorescent lamps, everyone knew that tube light bulbs were untouchable. Because getting started is a burn.

This problem is the same for LEDs, even though they are LED cold light sources. However, as the power demand of LED bulbs becomes larger and larger, the monolithic power of the lamp bead chip becomes larger and larger, so that higher brightness can be obtained under the same volume, but this puts forward higher requirements for heat dissipation. Because if the heat dissipation is not good, although the LED can light up normally (the junction temperature is lower than 150 degrees is usually "light up" is no problem), but it will bring a serious problem: light decay.