What is the reason when the low beam headlights appear to be on but seem ineffective?

[IsabelleFitz]

This may be due to the height adjustment of the low beam headlights, which can be adjusted at a 4S shop. Alternatively, it could be caused by window tinting films with poor light transmittance, leading to this situation. Here is some information about car lights: Low beam headlights: Designed for close-range illumination, they feature a wide coverage angle (160°) but a short projection distance, and the focus cannot be adjusted. Function: Low beam headlights have a distinct cutoff line between light and dark. Most vehicle low beams illuminate a distance of 30-40 meters, with the cutoff line located around 12-18 meters. The area in front of the cutoff line is brightly lit, allowing clear object identification, and a visibly illuminated area of 2-3 meters in diameter can be seen on the ground. The area from the cutoff line to 30-40 meters relies mainly on ground-reflected light, where brightly colored objects can still be distinguished. High beam headlights: These should only be used when there are no other lighting facilities on the road and no oncoming vehicles, as they can severely impair the vision of other drivers.