The evolution of Tail Lights has been dramatic. Since the advent of LED tail lights, the design of tail lights has undergone many improvements. LEDs can provide better uniformity and reduced the need for reflectors. They can be much thinner than traditional tail lights. However, early LED designs aimed the LEDs directly at the vehicles behind. This resulted in annoyingly narrow tail lights for many drivers.
LED tail lights are gaining in popularity as they require less energy and last longer than traditional tail lights. Halogen tail lights are the most common but can be replaced with xenon lights if you want stronger, brighter light. Both of these options have advantages. The downside is that LED tail lights are more expensive up front, but they won't need replacing as frequently as halogen or HID tail lights.
To replace a tail light, you should take a look at the wiring and lens of the car. Make sure they are in good condition. You should check them at least once a year. To do this, you can back up against a garage or wall and check how well they work when you press the brake. If the light doesn't work, you should replace the tail light or troubleshoot the relay.
Another common reason for tail light failure is a burned bulb. This will not damage the circuitry of the entire rear light system, but will result in just one rear light being out. The other lights will still function normally.