The night light comes with a sensitive light sensor to detect the current ambient light level. Intelligently adjusts itself throughout the night. the brightness of night lights will be different under different lighting environments. the darker the environment, the brighter the night light It's a better guiding light.The sensor night light uses 4pcs super bright LED, no bulb replacement, 12hrs each day, Less than 30 cents cost for annual power consumption. Probably not even enough to make any movement of your power meter.It is perfect for Kid's Room, Living Room, Bedroom, Bathroom, Hallway, Stairways, Corridor and anywhere you need a guiding light.If you’re ready to stop walking in the dark and start easily moving through your home.