The automobile headlamp may encounter the following problems in extreme weather: A. Cause of fogging or water ingress: In extreme weather such as rainstorm, high humidity environment or large temperature difference, the moisture inside the lamp may condense on the inner wall of the lampshade to form fog; if the lamp is not well sealed, rainwater or water may enter the lamp cavity through the vent hole, sealing strip, etc., resulting in water ingress. Impact: Fog or water will reduce the light transmittance of the lampshade, weaken the brightness of the light, scatter the light, affect the lighting effect, and may damage the lamp circuit in serious cases.B. Cause of light scattering or glare: In foggy, snowy or dusty weather, tiny particles in the air will reflect and scatter the light of the lamp, so that the light can not concentrate on the road ahead, forming glare or halo. Impact: The driver’s line of sight is disturbed, making it difficult to clearly identify road conditions, obstacles or other vehicles, increasing the risk of driving. C. The reason for the decrease of light brightness: In extreme weather, the lamp bulb may be affected by sudden change of temperature, humidity or increase of circuit load, resulting in the decrease of luminous efficiency and brightness. Impact: At night or under low visibility conditions, insufficient light brightness will make it difficult for drivers to see road edges, traffic signs, etc., affecting driving safety.
