LEDNICEKER Fairy Solar Powered Lights String, 6m 20ft 30 Bright Crystal Ball LED Bulbs, Waterproof Lamp for Indoor and Outdoor Activities(Blue-colored) Environmentally friendly solar powered LED string lights for gardens, patio, lawn, yard, porch, garden fence, Christmas trees, camper and parties 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 selection