What is the function of night light?

We have different series of night lights with different functions.The mainly items are intelligent  night lights,it was built-in smart light sensor,the night light automatically light up only when the room is dark enough.Some of newest items with USB charging ports,5V/2.1A*2 USB night light charger allow you charge 2 devices simultaneously, built-in intelligent module will detect the device automatically to deliver the fastest possible charge speed.