01
Why are car taillights red?
★ First of all, optically speaking, red light is the farthest band in the spectrum, so we can see red objects from a long distance away. And because red light has strong penetrating power, it can also be seen in foggy and rainy days. Eye-catching.
★ Secondly, from a psychological point of view, red has a warning effect, which can form alarm cues in people's brains and make people more likely to be vigilant. Therefore, not only the tail lights of cars, but also many warning or prohibition signs in life, It's red.
To sum up, the reason why the taillights are made red is to make it easier for the vehicles behind to detect the vehicles in front, and to create a vigilance mentality and improve safety awareness.
02
Why is the turn signal yellow?
★ First of all, yellow light is the most penetrating light, so it is not invisible in rainy and foggy weather. After all, the turn signal is an important tool for predicting vehicle dynamics. In addition, just like traffic lights, you should be careful when the red light stops, the green light goes, or the yellow light. The yellow light can remind people.
★ Secondly, this is related to the car manufacturing regulations in various places. Regarding the light color of the rear turn signal, American regulations allow red or amber (yellow), while European regulations require amber (yellow). However, Chinese regulations do not require lights. The regulations are basically the same as the European regulations, and yellow applies to a wider range of regulations, so most cars use yellow turn signals.
03
Why are daytime running lights white?
★ Daytime running lights are a new type of car lights that have come out in recent years. Their main function is not to illuminate, but to give vehicles higher visibility during the day, thereby reducing the occurrence of traffic accidents. Since 2011, the European Union has stipulated that domestic vehicles It is mandatory to install daytime running lights.
★ The function of daytime running lights leads to two requirements for the light source: first, high brightness so that they can be eye-catching enough during the day; second, low energy consumption so that they can be in working condition for a long time. Therefore, LED light sources have become the best choice, so most of the daytime running lights we see now are LED light sources.
Having said all this, it actually has nothing to do with why daytime running lights must be white...because there is no regulation that stipulates that daytime running lights must be white. This is more like an unspoken rule in the industry. I guess it may be Because white light can take into account both the visual sense of luxury and the visibility during the day.
Explained so much
I don’t know if you understand
No matter what color the light is
There must be a reason for its existence
You just need to remember:
Stop on red light, go on green light,
The yellow light is on. Wait!
Source: Lanzhou Traffic Police
