Lychee Solar Christmas String Solar Fairy String Lights for Outdoor Room Garden Home Christmas Party Decoration Waterproof (Blue, 52m 500Leds) Bulb Type: LED Solar. Power Source: Solar power. LED light can keep glowing for about 8 hours a night after fully charged during the day Waterproof, suitable for indoor and outdoor use Great for Christmas, party or other celebration occasions 52M 170ft 500 LED Solar Powered String Lights - Blue