The Guardian Lamp was specially designed for children or anyone who is afraid to go to sleep in the dark. While there are already many different night lights available on the market today, this one is different. Simply twist the base of the light to adjust the time on the calibrated dial before you sleep. The Guardian lamp stays lit for this time, but gradually diminishes in brightness so it doesnt interfere with sleep. Once the time has elapsed, the light switches off by itself and doesnt use any energy needlessly. This creates a comfortable bedroom environment that promotes a good, healthy night of sleep.