Fog lights generally refer to car fog lights. Car fog lights are installed at the front and rear of the car to illuminate the road and provide safety warnings during driving in rainy and foggy weather. Improved visibility for drivers and surrounding traffic participants. Anti fog lights are divided into front fog lights and rear fog lights. The front fog lights are generally bright yellow, while the rear fog lights are red. There is a slight difference between the logo of the rear fog lamp and the front fog lamp. The light line of the front fog lamp logo is downward, while the logo of the rear fog lamp is parallel, usually located on the instrument console inside the vehicle. Due to the high brightness and strong penetration of anti fog lights, which do not cause diffuse reflection due to fog, correct use can effectively prevent accidents. In foggy weather, the front and rear fog lights are usually used together. Test project materials, appearance, optical performance, flicker frequency, sealing protection performance, weather resistance, etc