We know a car is made up of thousands of parts,we can't understand all these parts, but as owners need to focus on their maintenance replacement cycle.
The car headlights need to be replaced regularly.The most common car headlights are halogen lamps, xenon lamps and LED lights.Different headlights have different working hours, and the brightness of the headlights will be reduced after a certain period of time, so it is necessary to check and replace them.
The equivalent of a car's eyes because of the lighting of the night driving.The performance of headlights will directly affect the safety of driving at night.If there is a lack of brightness, then it is necessary to replace the headlamp, and it is recommended to replace both sides at the same time so as to avoid the different brightness of the two sides.

Xenon lamp
Xenon lamps are mostly available only in the middle and high-end models cars.
Replacement cycle reference: xenon lamp life of 1000-1500 hours, according to the personal use of lights, 3 years or 50,000 km inspection replacement.
Replacement cycle solution: xenon lamp has a service life of 1000-1500 hours, assuming an average of 2.5 hours per day, and the replacement cycle of the headlights is 500 days.If there is a lack of brightness, then it is suggested to change the lamp store professionally, choose high-quality headlamp brand, and upgrade to avoid safety hazards due to insufficient lighting.

LED lamps
In 2008, audi first used LED lamps on A4. The era of LED headlights are come.In the past, the LED was equipped with high-end cars, and now the new middle and high models are also popular.
Replacement cycle reference: the LED lamp will live 20,000 hours, according to the personal use of the lamp, 5 years or 100,000 km will be checked and replaced.
Replacement cycle, the service life of LED lamp general in 20000 hours, that is to say, if you are open 24 hours a day then you can use for 800 days or so, of course, no one  will be 24 hours open headlight, so basic around 5 years LED lighting can check whether need to change.