What is the role of the fog light?
Don't rush to cast a disdainful look, many drivers can't answer. Here's a unified answer: First, supplement the lighting in the rain and fog; Second, let the people around you find your presence. The first point is very understandable, but the second point, many people do not realize, so, the next few questions: When to open the fog light, when can not open, what is the reason … naturally can not answer. Therefore, the following focuses on answering these questions.
Why are the colors of the front and rear fog lights different?
Regardless of the front and rear fog lights, the principle is actually the same. Then why are the fog lights different in front and rear? This is the so-called "specific case analysis".
When do you use fog lights and when can't you use them?
Due to this special principle of the fog light, it has a certain range of use. First, the light source of the fog light has no directionality, which is similar from all angles. When the fog is heavy, the light intensity is just right. In this way, the fog light plays a role in improving the recognition. When the visibility returns to normal, the high brightness and scattering characteristics make the fog light a very glaring light source, and the fog light should be turned off without hesitation.
Secondly, in the rain and fog, the fog lights are not always ready for use. Regarding its use, let's take a look at the official statement of the Ministry of Public Security:
1. When the visibility is between 200m and 500m, the low beam, the width and the taillight must be turned on. The speed should not exceed 80kmh, and the preceding vehicle that travels in the same lane must maintain a distance of more than 150m.
2. When the visibility is 100-200m, the fog light, low beam light, width light and tail light must be turned on. The speed should not exceed 60kmh, and the distance between the front and the front car should be 100m or more.
3. When the visibility is 50-100m, the fog light, low beam light, width light and tail light should be turned on. The speed should not exceed 40kmh, and the distance from the front car should be more than 50m.
4. When the visibility is less than 50m, the public security traffic control department will take traffic control measures to close the expressway in partial and full sections in accordance with the regulations.
That is to say, only when the visibility is less than 200m, the fog light will be used. There are two reasons: First, when the visibility is greater than 200m, the headlights, the width light, and the taillights can provide sufficient illumination and warning effects. Second, the fog can make the fog lights softer, and the line of sight is not good. The fog lights serve as supplemental lighting.
Which of the rear fog lights and double flash lights is more conspicuous?
In the case of bad weather on the highway, many drivers can't wait to turn on the double flash. Many people even have such a kind of mentality, and they have double flashing lights, thinking that they are the "privileged cars" that are attracting thousands of people. In the heavy wind and heavy rain, they frequently interspersed in the traffic flow. We don't take the time to condemn this behavior, but there are three issues worth discussing: First, does the double flash light apply in rainy and foggy weather? Second, open double flash but do not open fog lights, when do you need fog lights at this time? Third, open a double flash, what to do when changing lanes?
The double flash is bright yellow and the color is close to the fog lights of the past. It makes people feel that it is all right in the rain and fog. In fact, the double flashing lights just look "obvious", the actual effect can not be compared with the fog lights. First of all, it has not been specially designed like a fog light, and the light emitted is irregular scattering like a taillight, rather than regular radiation; secondly, its brightness is far less than that of a fog light.