What does automatic on/off of car headlights mean?

[OCarlos]

For cars equipped with automatic headlights, when the ambient light becomes dim while driving, the headlights will automatically turn on, and they will automatically turn off when the light becomes brighter. The "automatic headlights" feature is particularly useful when driving through tunnels. Automatic on/off: It is a function where there is an "AUTO" marking on the headlight control lever. When this function is selected, the vehicle's light sensor will control the turning on and off of the headlights based on the brightness of the external light, eliminating the need for manual operation by the driver. Light sensor: It is generally located at the frontmost part of the center control panel. The performance of light sensors varies among different manufacturers, with some being highly responsive and others being relatively slower.