GoFurther Solar Powered LED String Lights Waterproof 20ft 30 LED Multi-color Crystal Ball Fairy Lights For Outdoor, Indoor, Gardens, Lawn, Patio, Christmas, Weddings, Parties Easy to install and simple to operate. Solar energy powered, no electric wiring required. Automatic sensor activates after built-in battery is charged, lights out in daylight, lights work at dusk automatically. Super long working time, it can continuously work more than 8 hours at night if the panel absorbs enough sunshine during day. Two lighting modes for optional: static light, flashing light. Waterproof, suitable for indoor or outdoor using.