Xodus Innovations FPC1210 Battery Operated LED Dusk to Dawn 9" Taper Window Candle with Flicker Flame Automatic light sensor turns candle on at dusk and off at dawn Realistic flicker "flame" without hot wax, heat or dangerous flame great as an emergency candle Lasts up to 20 days on 2 AA alkaline batteries (not included) Measures 7 inches high by 3 inches wide and 2 inches deep LED light source eliminates need for bulb replacement