If the least commonly used light in cars is fog lights, do you agree?
The reason for this definition is that in most areas there is very little fog, so fog lights are basically not used. There must have been owners who didn't use fog lights once until they sold the car.
The low presence of fog lights is used by some car companies, which simply eliminate the front fog lights in order to save costs, so that you can't use them if you want to.
Is it okay without front fog lights?
This is due to our regulations. According to the regulations on the installation of exterior lighting and light signaling devices for cars and trailers (GB4785), vehicles must be equipped with rear fog lights, but there is no hard and fast rule for front fog lights. This allows individual car companies to exploit loopholes, save the front fog lights and save some costs.
Since the frequency of use of fog lights is extremely low, why should there be fog lights? Can't turn on the headlights and taillights in foggy weather? Today I will talk to you about the cold knowledge of car fog lights.
What is the difference between fog lights?
We know that foggy weather is mainly low visibility, and in order to increase driving safety, we need more penetrating and brighter lights. Of course, fog lights are not only lighting, but more importantly, let other vehicles see themselves as soon as possible.
Most models of front fog lights will be bright yellow, the standard color temperature of about 3000-3500K, there are halogen, xenon and LED bulbs. Because the wavelength of yellow light is very long, second only to red light. Therefore, the yellow fog lamp has strong penetration in foggy days and is easier to be seen.
At the same time, the front fog lights of the car are mostly designed under the bumper, slightly below the headlights. Because fog lights can only assist in illumination, and more to be recognized by other vehicles, they are designed to be low and illuminate the ground to avoid strong light affecting the driving safety of other vehicles.
Of course, the rear fog lights of the car are all red lights that are brighter than the tail lights. In foggy days, turning on the fog lights will be easier to be seen by vehicles behind. However, if it is regular weather, do not turn on the rear fog lights, which will cause glare on the rear car and affect the rear vehicle.
Why are the front and back fog lights different in color?
As mentioned above, most of the fog lights in cars are red and yellow. But why should the front fog lights use yellow and the rear fog lights use red, are the same color?
The sensitivity of the human optic nerve to different wavelengths of light is not the same. According to the experimental results, the International Commission on Illumination (CIE) has determined that in the case of open vision, that is, when the brightness is greater than 3cd/m2, the sensitive wavelength of the human eye is at 555 nm, which belongs to yellow-green light. In the case of dark vision, that is, when the brightness is less than 0.001cd/m2, the sensitive wavelength of the human eye is at 507 nm.
However, the wavelength of yellow light: 540~600nm. It makes sense to use it as a front fog light for a car.
However, we are accustomed to recognizing the red light as the stop light, and the red light is the main color of the tail light, so in order to identify the rear or the front of the car, the rear fog light is selected with high brightness red, and the front of the car uses high brightness yellow.
Conversely, if the front and rear fog lights are the same color, you may not be able to distinguish whether the car in front of you is driving in the same direction or in the opposite direction in foggy weather.
It is worth mentioning that with the popularity of LED lights, some vehicles have designed the front fog lights into ordinary white LED lights, but placed in the position of fog lights. This practice completely disrespects the use of fog lights, which is meaningless for safe driving on foggy days, and smaller white light fog lights are not as obvious as turning on LED headlights.
Different front and rear fog lights?
Many people may not know that the direction of the car's front fog lights and rear fog lights are different, the front fog lights are illuminated downwards to the ground, and the red fog lights are horizontally illuminated backwards.
The reason for this design is also because the fog lights are brighter, if the front fog lights shine directly into the eyes of the driver of the other party, it is easy to cause glare to increase the danger. Some of the original high-brightness fog lights or modified high-brightness fog lights, direct horizontal illumination, basically equivalent to turning on the high beam lights; and the rear fog lights are basically to remind the rear to come to the car, is the same as the brake lights, so it is illuminated backwards.
How to divide the fog light indicator into front and back?
When it is necessary to open the front and rear fog lights, many car owners can not distinguish which represents the front fog lights, which represents the rear fog lights, always can not remember.
In fact, according to the principle of different directions of front and rear fog lights, it is easy to identify the front and rear fog lights.
The front fog light shines diagonally downwards, so the indicator light with slash and wave in front of the arc light is the front fog light. Similarly, the front of the arc light pattern is a horizontal straight line plus waves is the rear fog light indicator.
In addition, most vehicles have green fog lights and yellow fog lights, and color is also a way to help distinguish between front and rear fog lights. If individual vehicles do not distinguish between front and rear fog lights, they need to be distinguished by graphics.
What are the front and rear fog lights turned on?
The vast majority of fog lights on the market are opened in three ways:
1. Lever rotation type
Most of the rotary fog lights of the lever are at the turning light lever, and there are also fog light logos, which are generally turned on and rotated to the corresponding position of the fog light indicator. According to the usual design of fog lights, basically turn on the front fog lights first, and then turn on the rear fog lights, except for models without front fog lights. When the rear fog light is turned off, it is necessary to turn back to the first gear of the front fog light, and rotate to the off place when all turned off.
2. Rotary knob type
Some German models will set the light control button on the lower half of the dashboard on the left-hand side of the steering wheel and turn on the light by rotating it.
Among them, the opening of the fog light needs to be rotated to the fog light indicator mark, and the fog light needs to be pulled out after the individual vehicle is turned on. When closed, it is also necessary to return the knob, or rotate the knob to the designated fog light sign.
3. Push-button type
Some American or European models will set the fog lights separately with buttons, and the front and rear fog lights can be controlled separately, so that the model can turn on and off by pressing the corresponding fog light buttons.
However, it should be noted that most of the button fog lights need to be illuminated after the revelation wide light or headlight can be lit. If you do not turn on any lights, the fog lights may not be lit.
In addition, the opening order of the fog lights is often to turn on the front fog lights first, and then turn on the rear fog lights. Many models have the situation that the front fog lights cannot be turned on without turning on the rear fog lights, which needs to be paid attention to.
summary:
It is precisely because the fog lights of cars are the least commonly used, and even some car manufacturers abandon the front fog lights, so many car owners cannot remember the opening method and indicator recognition method of the front and rear fog lights, and more novice drivers will not open the fog lights.
Fog lights, as an important light to increase driving safety in foggy or rainy and snowy weather, are as important as learning to turn on car headlights.
Finally, Pin Cha wants to chant a poem:
Car fog lights are not commonly used, for safety to remember.
There are many ways to open it, which one will be on the stall.
Excuse me!