The Click Lewis Solar LED Sensor Bollard Light features a built-in motion sensor that will increase brightness of light when it detects motions at night. When motion is no longer detected, the light will remain dim to save battery power. It is a great feature to enhance security in the outdoor area. With the built-in solar panel that automatically charges the built-in battery with exposure to sunlight during the day, the product will turn on its light automatically at dusk, ideal to illuminate and decorate your house exterior, pathway and garden.