?? 【Auto ILLUMINATION】Night light plugin with smart dusk to dawn Light Sensor, automatically turns on only when ambient lighting becomes insufficient. auto on at night and auto off at day time. Intelligently adjusts itself throughout the night. You don't have to be afraid of the dark night, It's a better guiding light. ?? 【EXACT BRIGHTNESS】Not too bright, not to dim, just the right amount of light to see where you are going in the dark, Allows you to get up at night, get some water, use the restroom and return to bed without turning on any main lights. ?? 【ENERGY EFFICIENT】The 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. ?? 【SPACE SAVING& WIDELY APPLICABLE】 Takes the space of only one plug, allowing you to plug another device in the outlet while using the night light. It is perfect for Kid's Room, Living Room, Bedroom, Bathroom, Hallway, Stairways, Corridor and anywhere you need a guiding light. they have light sensors so turn on when it is dark and turn off when it is bright.