These solar powered string lights provide decorative lighting without the constraints and costs of traditional lights. They are powered during the day by the sun and turn on automatically at dusk. These lights can run up to 8 hours on a full charge and, with a water-resistant design, these are perfect for the front or back yard. (Two sets of lights included per order.) Water resistant design for use outdoors | RDK Products Solar Powered 64" LED String Lights, 2 Pack