Gudcraft 5805 Solar Powered Multi Color Christmas Holiday Lights Solar String Lights 50 LED The solar panel connected to these lights converts sunlight to electricity during the day; once the sun goes down the lights go on and will last for up to 8 hours Solar energy doesnt require an outlet, will reduce your carbon emissions, and wont impact your electric bill Use them just like regular holiday lights: drape them around trees, bushes, fences, and more Two light settings: Solid or twinkling Product specifications: 50 lights, 19.5 foot length; Light Color: Multi-Colored