Which is important, the brightness and illuminance of car led headlights?

At present, there are many friends who want to buy led headlights. The consideration is that the brighter the led light, the better, and the brighter the road, the clearer the road. In fact, this is a misunderstanding of brightness and illumination. Why do you say that?

Because it is very simple to increase the brightness of car led headlights, it is possible to greatly increase the brightness of the light by adding a light source. However, such a rough increase of the lamp beads will not have any benefit for the illumination, it will also increase the amount of heat, and shorten the led. The service life of the lamp, this kind of lamp is high in brightness and does not shine on the road, which is what the old driver said of "high beam dog"!

What is the illuminance? Illumination is the intensity of light that is effectively focused to the desired position. This is what we are most concerned about. If all the light hits the road, there is no waste. Such a car light can see the road clearly and outside. Look at this headlight is not dazzling, such a headlight is a good led headlight!

Therefore, brightness is not equal to illuminance, illuminance is what we should pay attention to!