Many car owners will encounter the phenomenon of fogging or water in their car headlights. So, does it matter if the car headlights fog up or get water? How to distinguish and deal with it?
Car lights fogging up is generally a normal phenomenon
In fact, fogging of car headlights is relatively common and is usually a normal phenomenon. We know that when high-temperature and high-humidity gases come into contact with low-temperature substances (such as glass, etc.), they will condense into water droplets. That is to say, the moisture contained in the air increases as the temperature rises. If the temperature drops, it will condense and cause condensation to occur.
The car lights themselves are not completely sealed. There are vents to balance the internal and external air pressure. Under suitable conditions, such as when a vehicle is driving on a rainy day, the window glass cools rapidly and the temperature near the glass inside the car also drops sharply. Therefore, the moisture contained in the air will condense, and this moisture will adhere to the inside of the window glass. , the car lights will condense and fog up.
Generally speaking, as long as there is no internal fogging, but only fogging on the inner surface of the lampshade, it is normal. Usually after the car lights are turned on for an hour, the fog in the area illuminated by the light can be completely dissipated, and at the same time, the fog in other areas It basically dissipates and does not affect the normal use of car lights.
If water has entered, be careful
What is more serious than fog is water in the headlights. In this case, there is a problem with the sealing of the headlights.
Poor sealing design of the lamp itself, improper sealing cooperation between the plug-in and the wiring harness, poor definition of the gap between the lamp and the body, damaged vents, etc., will all cause water intrusion problems in the car lights, especially during car washes and rains.
You can usually see water accumulation in the car lights visibly with the naked eye, and it does not disappear after 1 or 2 hours with the lights on.
How to tell whether the car lights are fogged or filled with water?
To determine whether the headlights are filled with water or fogging, first we look at the traces of water flow.
Fogging is generally caused by a film or dewdrops forming on the surface of the headlight lampshade, with no trace of water flow. Due to the large amount of water entering, it condenses into dewdrops and flows from the top of the headlight to the bottom of the headlight. This will form obvious traces of water flow, similar to a waterfall. Even if the water dries, there will still be some traces, just like the path of a snail. There will be traces.
Secondly, we also judge by whether it will disappear on its own.
After the fog inside the car lights appears, it will take about 1 to 1.5 hours to completely eliminate the fog with the lights on; in a static state, it can be stored in a dry environment with humidity <50% for 24 to 36 hours. The fog can be completely eliminated automatically and this phenomenon is called fogging.
And if a large area of fog condenses on the inner wall of the lens and condenses into water droplets and flows downward, accumulating inside the car light, when the car light is used for a long time and many times, as the temperature rises, the fog will adhere to a large area of the inner surface of the light distribution mirror. , this phenomenon should be judged as water intrusion.
Car lights need to be repaired if water enters them
Water entering the car headlights not only affects the appearance of the car lights, but also reduces the lighting effect, affecting driving safety at night or on rainy days. At the same time, water entering the headlights also indicates that the sealing is insufficient, which will cause moisture and pollutants to enter the interior and cause problems with the vehicle wiring. This must not be ignored.
Therefore, if water enters the car lights, they need to be repaired and replaced in time. Otherwise, it is very easy to cause damage to the car lights.
When we drive every day, especially in summer and winter when moisture is relatively abundant, we must develop a good habit of regularly checking vehicle headlights.
