Generally, third LED brake light is installed upon car rear so that the rear car can easily find the front car brake to avoid rear-end accident.
Third LED brake light is used to warning the behind vehicles. No third LED brake light vehicles, particularly lower chassis vehicle and mini automotive, because of its low brightness when the car brakes, the rear followed vehicle (especially higher chassis trucks, buses and public buses) is sometimes difficult to see clear. Therefore, rear-end accidents occurring risk is greater.
Large number of studies shows that third LED brake light car effectively prevent and reduce rear-end accidents. Therefore, third LED brake lights have been widely used in many developed countries. For example, in the USA, all new cars must be installed with third LED brake light since 1986 in accordance with the regulations; all new light trucks also have to install third brake light since 1194.