The main use cases for automotive headlights include nighttime road driving, tunnel passage, rainy and foggy weather, and low-light environments such as underground parking lots.
According to traffic regulations, vehicles must turn on their headlights between sunset and sunrise. Some countries also mandate their use when visibility is below a certain threshold. During use, the headlight assembly's sealing should be checked regularly to prevent moisture ingress that could cause short circuits or damage to the light source. If a decrease in headlight brightness or a shift in the beam range is observed, it may indicate aging of the light source or misalignment of the rearview mirror, requiring timely repair or replacement. Furthermore, retrofitting headlights to non-original factory specifications may affect vehicle inspections; it is recommended to prioritize products compatible with the original vehicle's specifications.
