Do you need a lens for the car's LED lights?

"A sign to judge the quality of LED lights is: there is no condenser lens, if it has, then the light type is good, if not, then the astigmatism, light type is poor, it is recommended not to buy." On the Internet, we often see a variety of tricks, and friends who buy LED lights sometimes have difficulty distinguishing between them. One of the tips on lenses that I just mentioned is one of them.

Then, does the LED headlight have to be equipped with a condenser lens, and what are the advantages and disadvantages of the LED lamp? Today we will talk about this topic.

This has to start with the LED lamp's predecessor halogen and xenon lamps.

The halogen lamp is an evolutionary version of an incandescent lamp. It is energized by a tungsten wire in the lamp to excite heat radiation. The difference is that it injects a halogen gas such as iodine or bromine into the bulb. At a high temperature, the sublimated tungsten wire chemically reacts with the halogen. The cooled tungsten will re-solidify on the tungsten wire to form a balanced cycle, avoiding premature rupture of the tungsten wire, allowing the bulb to last longer and brightness to be higher.

High intensity Discharge (HID) refers to the internal filling of an inert gas mixture including helium, which activates the inert gas in the quartz tube and emits arc light through a high voltage of 23000 volts. This is different from a halogen lamp, which is a form of a lamp that does not rely on filament thermal radiation but emits arc light, and can achieve higher color temperature and brightness at lower power.

The concentrating lens is prosperous with the popularity of xenon lamps.