The adjustment of headlight focus is an important task in vehicle maintenance, which ensures the safety and clarity of vision during night driving. By adjusting the adjustment knob on the back of the headlight, we can change the position of the light to achieve the effect of adjusting the spotlight. It should be noted that the headlight adjustment methods and tools may be different for different models, so you should refer to the specific vehicle's manual or consult a professional when making adjustments.

　　Before adjusting the focus of the headlights, you first need to shine the lights on the wall, so that you can more intuitively observe the offset or height of the lights. If you find that the light has obvious offset or inappropriate height, you need to adjust it accordingly by adjusting the knob. Adjustments should be made step by step, observing the changes in light on the wall while adjusting, until the ideal focusing effect is achieved.

　　Traditional halogen lamps have better light-gathering performance because their luminous principle is that the tungsten filament lights up and emits light, and the light radiates from a central point to the surroundings. This kind of point light source can gather the light and shine it forward through the refraction of the lamp bowl, thereby forming a uniform lighting effect on the road surface and ensuring that the driver has sufficient vision brightness in front.

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