We need to know more about what is a lens in the first place? Lamchange after the market often said that the lamp lens, generally refers to the car double light lens. The reason why it is called a double-light lens is because there is a shade in the lens. The near light is realized by moving up and down of the shade. When the shade is closed, it is near light, and when the shade is opened, it is far light. In this way, with only one light source, you can achieve the near-far light switch.

 Benefits of a lens:

1 to have a lens to focus more light. When using the lights, the light does not scatter. If the bulb is replaced separately, it will scatter clearly, and the opposite driver will not see clearly.

2. Because the light distribution is very small, its lighting range is farther and clearer than that of ordinary halogen lamps. Therefore, it allows you to see distant things first, avoiding crossing or missing goals.

3. Lens light, near the light when driving "Z" tangent line, so that the car will not be dazzling, you can clearly see the front.

4. The width of the lens illumination and the illumination distance are increased more than 4 times, which fundamentally changes the effect of far light and near light.