Is It Normal for Car Headlights to Get Hot?

[LorenzoLynn]

Normal. Here is the relevant introduction: When the headlights are turned on, current passes through the filament, generating a significant amount of heat. The filament reaches a high temperature and emits light. The light emitted by the filament contains infrared components, most of which pass through the bulb's glass and radiate into the surrounding environment, while a small portion is absorbed by the glass. When you touch the headlight cover, it will feel very hot to the touch. If a headlight is damaged, it is usually replaced with a similar unit. Some cars are equipped with High-Intensity Discharge (HID) headlights, which generate a high-density light source through a high-voltage arc discharge produced by a pre-designed electronic system. Check the headlight lens for cracks. Although surface cracks do not affect the lighting performance of the headlight, moisture can seep into the headlight along the cracks, reducing the lifespan of the bulb.