Battery Operated LED Dusk to Dawn Light Sensor Window Candle with Brass Base Flicker and Full On Setting, Automatic light sensor turns candle on at dusk and off at dawn Choose from realistic flickering or full on flame great as an emergency candle Lasts up to 20 days on 2 AA alkaline batteries (not included) LED light source eliminates need for bulb replacement and there is no hot wax, heat or dangerous flame Measures 8.5 inches high by 4.5 inches wide and 1.65 inches deep