At present, many friends who want to buy LED headlights think that the brighter the LED, the better. The brighter the LED, the clearer the road will be. In fact, this is a misunderstanding of brightness and illumination. Why do you say so?

Because it is very simple to increase the brightness of automobile LED headlights, that is, increasing the luminous source can greatly improve the luminous brightness. However, such a rough increase of lamp beads will not do any good to the illumination. It will also increase the calorific value and shorten the service life of LED headlights. This kind of car headlights has high brightness and does not illuminate the road. It is also what the old driver calls "high beam dog"!

What is the illuminance? Illuminance is the intensity of light that can effectively focus the light to the required position. This is what we care about most. If all the light shines on the road, there is no waste. Such a lamp can see the road clearly, and it is not dazzling outside the car. Such a lamp is a good LED lamp!

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