Don't waste electricity by leaving a nightlight glowing all day long! The Color-Changing Nightlight has a built-in photo sensor that turns the light on automatically at dusk and off when the sun comes up.White nightlights can seem dreadfully dull day in and day out, but the Color-Changing Nightlight casts a glow that envelops the entire spectrum of color. This LED nightlight will change colors all night long, but if you're in a red or green mood, you can press the color-lock button to freeze the flow at any color you choose. Since it glows only when the room is dark, the Color-Changing Nightlight isn't wasting energy all day long. When lit an average of 10 hours a day, this nightlight will cost only $0.30 per year.