Why is red taillights?

First of all, the optical, the red light in the spectrum in the band is to spread the farthest, so we could see far across the red objects, but also due to the strong penetration of red light, when the fog rain also eye-catching.

Second, from a psychological point, with a red warning, alarm hint can be formed in the human brain, it is more likely to create vigilance, so not only is the car's taillights, to identify a number of warning or prohibition of life, both It is red.

In summary, the reason will be made of red taillights, the rear of the vehicle in order to make it easier to detect vehicles in front of and generate alert psychology, improve safety awareness.

Why turn signal is yellow?

First, yellow is the most penetrating light, and therefore not afraid visible in rain and fog weather, after all, turn signals is an important tool for the prediction of vehicle dynamics. In addition, like with traffic lights, red for stop, green for go, yellow to be careful, yellow give people play reminder.

Second, it has a relationship with the country regulations repairer, after turning on the lamp light color, US cars allow red or amber (yellow), European regulations force amber (yellow), while the gauge for vehicle lights the basic requirements are the same as with the EU, yellow applicable regulations wider, so most cars are using yellow turn signal.

Why daytime running lights are white?

daytime running lights in recent years a new type of lamps, lighting is not the main role, but during the day so that the vehicle is a high visibility, thereby reducing traffic accidents, starting in 2011, the EU has defined territory vehicles the mandatory installation of daytime running lights.

daytime running lights effect it causes the light source has two requirements: a high brightness can be striking enough in the daytime; two, low energy consumption, long time in order to work state. Therefore, the LED light source has become the best choice, so we now see most of the daytime running lights are LED light source.

Having said that, in fact, daytime running lights with white Why have nothing ... .. because there is no provision daytime running lights must be white on the legislation, which is more like an industry rule, probably because white can both sense and recognizable daytime visual bar.