23.0 " LED String Lights - Easy to install - No energy cost * Comes Prelit with 50 Multicolor Solar-Powered with Rechargeable Battery Lights * Features Up to 88% Less Energy Use than Standard Bulbs, LED Technology for Vivid Colors and Whiter Whites * Don"t let high electricity costs keep you from showing your lights in spirit. These solar powered LED lights run off the sun"s energy then turn themselves on at dusk and off when the sun rises.