Holiday Solar String Lights - Colored Solar Lights - Set of Twenty-One (21) 2" EVA Ball Lights Twenty-one (21) 2" sized Colored Ball Solar Strings - ideal for use outdoors for holiday tree and yard decorations These unique and festive glowing spheres add color and atmosphere to any holiday decorations The 2.1" (7cm) EVA textured colored ball are spaced about 14" apart along a 22.5' wire length. Powered by a large and powerful solar panel that can be ground mounted or attached to a nearby tree, post or building. A colorful and unique solar-powered holiday solar string. Turns on automatically at dusk.