Why are LED headlights hard to see in rainy weather?
2 Answers
The reason why LED headlights are hard to see in rainy weather is: the wavelength of LED light is long-wave, which cannot refract well in rainy conditions, resulting in reduced penetration. Methods for using lights when driving in the rain are: 1. When it first starts raining and the rain is light, turn on the car's daytime running lights; 2. When the rain becomes heavier, turn on the headlights and front fog lights; 3. In heavy rain, turn on the low beams and front/rear fog lights. Types of car lights include: 1. Headlights: The front lighting of the car is divided into low beams and high beams; 2. Fog lights: Used in foggy conditions when visibility is poor; 3. Brake lights: Illuminate when braking, installed at the rear of the car.
There are several main reasons why LED headlights are less visible in rainy weather. The cool white light of LEDs has weak penetration, and rain and fog can scatter the light, making it appear diluted and unfocused. Moisture absorbs light, especially on overcast days when the air is filled with water vapor, and the strong reflection from the road surface further reduces light efficiency. From my daily driving experience, LED lights appear much dimmer in the rain compared to clear weather, whereas halogen lights remain unaffected. If the headlight covers are slightly dirty, the rain can exacerbate the weakening of the light. It is recommended to clean the headlights regularly and consider adding a rain mode or adjusting the angle to improve practicality. When driving in the rain, it is best to reduce speed to ensure safety.
