Dimming method of automobile led lamp: 1. After turning on the high beam, stand in front of the headlights, keep your feet as close as possible to the headlights, observe the position of the high beam, and take the center of your feet and the light (the brightest light) as the center point and write it down; 2. Then move vertically to the wall (don't skew), and mark the wall with the position of the light on your feet; 3. Turn the graduated teeth of the headlight with screws, and be sure to shine the optical center on the mark you carved (the up-and-down distance should not exceed10cm); If the light is on, it means there is no one else in the car. You can raise the optical center a little (generally not more than 5 cm). There is a simple reason. Empty cars should be high, people should sit and cars should be heavy. The highlights of the lights can mainly be retained; 5. Adjust up and down to find that the optical center moves obviously. If you adjust it left and right, the optical center is not obvious. I turned several times before I moved a little, so I don't have to worry about seeing the optical center not moving left and right. Continue to turn the screwdriver until the optical center shines on the mark you carved.