Solar Powered LED Xmas String Lights, 30 LEDs Water Drop String Lights for Outdoor, Gardens, Homes, Wedding, Christmas Party, Waterproof (Purple) Antirust and waterproof suitable for Indoor & Outdoor This solar string light works by converting solar energy into electricity during the daylight,and lights up automatically at dark when it is on "ON" model. 30 led Solid Globe Led Lights with steel ball decorations outside create a fancy wonderful scene in any occasion. Two buttons,one is ON/OFF,the other is a Flashing Mode button where you can convert light to flash mode by simply press it. Total line length is 21ft and space between two lights is 0.5ft