What is the appropriate distance for low beam headlights to illuminate?

[LeRuth]

Low beam headlights generally illuminate a distance of 30-40 meters, which is considered appropriate. Experiments have shown that when driving at 55 km/h at night, the braking distance is exactly 30 meters upon immediate reaction. This means that if an obstacle is detected within the low beam illumination range and the vehicle stops immediately, there will be no gap between the vehicle and the object. Therefore, illuminating 30-40 meters is suitable. Precautions for using high and low beam headlights are as follows: Precautions for using high beam headlights: When using high beams, it is important to be aware of oncoming vehicles. When the distance to an oncoming vehicle is about 50 meters, the high beams should be switched to low beams. This is because high beams are too bright and can cause glare, which may impair the driver's vision and affect driving safety. Precautions for using low beam headlights: Low beams must be turned on when driving at night in areas without streetlights, during dusk when visibility is low, or at dawn when light is just appearing. Additionally, in conditions such as heavy fog, snow, or rainstorms where visibility is significantly reduced, low beams should be used even during the day to ensure traffic safety.