The function of daytime running lights is to make it easier for people to recognize the vehicle during the day. Its function is not to enable the driver to see the road clearly, but to let others know that a car is coming. Therefore, this kind of lamp is not a lighting lamp, but a signal lamp.
Of course, the addition of daytime running lights can make the car look cooler and more dazzling, but the biggest effect of daytime running lights is not in aesthetics, but in providing visibility of the vehicle. Turning on daytime running lights while driving abroad can reduce vehicle accidents by 12.4%, and at the same time reduce the probability of death in car accidents by 26.4%. In short, the purpose of driving lights during the day is for traffic safety.
In recent years, many countries have formulated relevant indicators for daytime running lights to ensure that the daytime running lights produced and installed can truly ensure safety. The most representative one is ECER79 in the ECE Automotive Technical Regulations of the Economic Commission for Europe. China also began to implement the national standard "Light distribution performance of car daytime running lights" released on March 6, 2009 on January 1, 2010.