Solarrific&reg; G3031 Solar 50 LED Multi-Colored String Lights- New & Improved Powered by solar, No batteries or electric wires needed Safer and Easier to Set Up than with Extension Cords 8 Hours of Bright Sunlight Generates a Full Charge, Up to 3 nights of 6 hours of Usage Attractive RGBY Multi-Colored Bulbs with Blinking or Steady Modes New & Improved with NiMH Battery