SET of 2 | 50 Bulb LED Color-Changing Solar String Lights Color-Changing - Once dusk sets in, each LED bulb automatically transforms into a glowing orb of light, gently morphing from one vibrant, jewel-toned color to the next. Each Strand measures 22 feet long (6.7 meters) with 50 LED bulbs spaced 4 inches (10 cm) apart. Each set requires one (1) AA 300 MaH NiCd Rechargeable Battery (included). Solar-Powered - No electricity required. Adorn bushes, wrap around trees, weave through trellises, or outline paths and walkways.