This LED fairy light is made with an IP65 waterproof design, these solar flashing lights are solidly engineered to make it suitable for indoor and outdoor use without any worries of short circuit or weather damage. LED crystal ball string lights are heat and cold resistant and can withstand all weather conditions, including heavy rain and snow. The built-in 1200mAh rebattery makes it highly efficient and requires no batteries or electricity. The solar fairy lights garden is designed with adjustable solar panels to absorb direct sunlight in summer and winter, charging time: 6-8 hours solar; discharging time: about 10-15 hours.