What does 'auto' on car headlights mean?

[OJaxon]

The 'auto' on headlights stands for automatic headlights. When the light intensity is greater or less than a certain value, the headlights will automatically turn on or off. Here is some relevant information: 1. Automatic headlights, the full name can be called 'automatic light-sensing headlights,' mainly rely on a key component, the ambient light sensor, to determine whether the lights need to be turned on; this sensor can automatically perceive the 'brightness' of the external environment. When the external brightness falls below a certain value, it will control the headlights to turn on automatically; when the external brightness exceeds a certain value, the headlights will automatically turn off. 2. Benefits: It can automatically control the turning on and off of the lights. For example, if you suddenly enter a tunnel during the day and forget to turn on the lights, the automatic headlights can be quite considerate. Or during dawn or dusk when the light is poor, the headlights will turn on by themselves to light the way ahead, making it much safer.