Why do some car lights turn on as soon as the car is unlocked?

[DeCamille]

The reason why the lights of some cars turn on as soon as the car is unlocked is that the car's lights are set to automatic mode. In this mode, the lights are automatically controlled by a built-in light-sensitive switch, which senses and controls the turning on and off of the lights. When the ambient light is sufficiently dark, pressing the unlock button will automatically turn on the lights. Conversely, when the light is bright enough, the lights will automatically turn off. Automatic headlights are designed for user convenience, featuring a light-sensitive control system installed for the headlights, known as automatic headlights, which are particularly useful when driving through tunnels. There is a photoresistor in the headlight power supply circuit that automatically connects when the external light is dark enough and disconnects when the light reaches a certain brightness, achieving an automatic lighting system through the light sensor.