[WapCar] The low beam light is for short-distance illumination, the design requirement is that the illumination range is large (160°), the illumination distance is short, and the spot-light degree cannot be adjusted. According to the light source, there are low beam lights such as halogen, xenon and LED.
The illumination distance of the low beam light is about 30 to 40 meters. According to experiments: when driving at a speed of 55km/h at night, the driver immediately stepped on the brake once the situation is discovered, the parking distance was exactly 30 meters. That is, when the situation is found within the range of the low beam light illumination to immediately stop the vehicle, there is no gap between the vehicle and the object.
Of course, this is when the car condition, road condition and the driver's reaction are all good, if the speed is higher than this speed, the car condition and road condition is poor, the driver's fatigue reaction time is long, the result is conceivable. Therefore, driving at night must control the vehicle speed. When using the low beam light on the flat, wide and well-sighted road, the vehicle speed can be increased appropriately. When meeting cars encounter complex situations such as uneven road or turning or bridge or narrow road or cross intersection, they should slow down, and the vehicle speed is generally controlled within 40km/h.