INST Solar Decorative Lights, Ambiance Lighting, 40ft 12m 100 LED 8 Modes Solar Fairy String Lights for Outdoor, Gardens, Homes, Christmas Party (Warm white) This solar LED works by converting solar energy into electricity during the day, and it lights up automatically at dark. 40Ft 100 LED lights 8 different modes, forming a beautiful and fairy world. Sealed process, with good waterproof performance. Suitable for indoor and outdoor decoration with trees, wreaths, etc. Any quality problems about the product, please contact us first.