An electroluminescent diode is called LED. LEDs have a lot of coverage, for example at home, in the road traffic, in LED TVs and so on. LED in the traffic will be replace other lights in cars. The energy efficiency is much better than in other lights and there life is much longer too. The life will be shown with 100. 000 hours. It depends on the temperature, the using and the environment. At first the LED lights were used in the car and not outside. The advantages are some other things too, like different colors, different possible designs, on and off oft he light without problems and so on. LED lights are possible for the different type of cars. The installation is very easy and you don't have to drive for a trained people.