CM-Light 16ft 20 LED D Outdoor Dragonfly Solar String Lights Waterproof for Garden Patio Fence Path Landscape Wedding Party Decoration (16ft 20 leds Multi-colo Solar powered LED lights string, ideal decoration for gardens, patio, lawn, yard, porch, camper and all indoor and outdoor activities 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 Two modle for this beautiful LED :Flash and Bright 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