What Causes Fogging in Headlights?

[JordanLynn]

Headlight fogging occurs due to temperature differences. If severe water droplets form, it indicates poor sealing, which is a quality issue. Headlights have an intake pipe and an exhaust pipe to vent heated air from the lamp. After turning off the engine, especially at night, the headlight interior cools down, causing water vapor in the air to condense on the lamp. This moisture evaporates when exposed to sunlight or after the headlights are turned on for some time, exiting through the exhaust vent. Headlights, also known as headlamps, are crucial components for safe vehicle operation. Mounted on both sides of the front of the car, they illuminate the road during nighttime driving and come in two or four configurations. The farther the headlight beam reaches and the better its light distribution characteristics, the higher the vehicle's safety performance.