KEEDA&reg; Moon Shaped Solar Powered Light Sensor Lights String, 15.75ft 20 Bright Waterproof LED for Christmas Decoration,Party,Wedding Outdoor Activities (Blue) Solar powered crescent moon LED lights string, ideal decoration for Gardens, Patio, Lawn, Yard, Porch, Garden Fence, Christmas Trees, Camper, Parties, wedding, Indoor And Outdoor Activities(15.75ft, 20 LED bulbs) The solar panel charges the battery during the day by converting solar energy and the sensor will turn on the lights automatically at night The charging can only be finished under ON mode, please switch on the lights by pressing ON button at the back of solar panel before charging The lighting performance was decided by the volume of solar energy converted and stored, it may vary with the intensity of sunlight, geographic locations, weather conditions and shift of seasons There are 2 modes to choose from, the lights can stay on steadily or blinking at once by your favor