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According to statistics, more than 50% of traffic accidents occur at night, and more than 20% of them are caused by insufficient lighting and lack of lights. The headlights are the eyes of the car. It is not only about driving safety, but also about the fashion of the car.

1. Lumen

Let's come to learn a few professional terms firstly: luminous flux, lumens, light decay.
Luminous flux: refers to the total amount of light emitted by the light source per unit time, and the luminous flux truly determines the brightness index of the light.
Lumens (LM): is the unit of luminous flux. The current high-power source is 100LM/W.
Luminous flux (LM) = power (W) * luminous efficiency (LM / W).
In theory, the greater the luminous flux, the higher the brightness, the more the lights can shine into the details.

2. Heat dissipation

Have you found that the lights will become darker after a while? Because of the existence of light decay, an important reason that affects light decay is heat dissipation. The heat dissipation is not good. The service life of normal LED lights can generally reach more than 50,000 hours. For example, driving for 2 hours every day can be used for about 65 years, so be sure to choose high-power lamps with good heat dissipation performance. At present, the heat dissipation mode of the lamp on the market is divided into active heat dissipation and passive heat dissipation, and the fan heat dissipation is active heat dissipation, and the passive heat dissipation is divided into copper tape heat dissipation and aluminum component heat dissipation. Active heat dissipation enhances convection and mitigates uneven temperature of the heatsink, making it the most intuitive, popular and effective heat dissipation

3. Concentrate

If the luminous flux is enough, the heat dissipation is no problem, but there is no concentrating, you can't buy such lights. Because good headlights have a strong concentrating ability, they can form a good light pattern and avoid astigmatism. To put it bluntly, it is not only to see others, but also to let others see themselves. Moreover, it should be noted that LED lamp modification can not only be color-first, the whiter the light, the weaker the penetration. The color of the light depends on the color temperature of the light source. The color temperature is low, the color of the light is orange, and the penetration is strong. The color temperature is high, the color of the light is white or blue-white, and the penetration is weak. Generally, the color temperature of a halogen lamp is about 3000K, and the color temperature of the original xenon lamp is between 4200 and 4800. The color temperature of LED headlights is generally between 4000K and 6500K.

To sum up, several factors that determine the brightness of LED lights are: the lumen of the wafer, the function of heat conduction and heat dissipation of the lamp body, and the concentration of light, because the concentration of light produces brightness. In addition, you can also choose a reliable product through brand strength, after-sales service and other conditions.