Britta Products SSR-01 Luminous Glow Solar String Light, Set of 12 Our unique Luminous Glow Solar Strings add a warm glow to your garden and yard. The set includes twelve (12) weather-proof 2.5" balls and a high-performance solar panel kit. These unique and warm glowing spheres add warmth and atmosphere to any garden The 2.5" (7cm) EVA textured ball are spaced 18" apart along a 16' wire length. Powered by a compact solar panel that can be ground mounted or attached to a nearby tree, post or building. A top seller that's improved for 2013 - we've increased the sphere size and now use a high-quality NiMH battery for extra performance