M.best Waterproof 4.8M/16FT 20LEDs Solar Lamps Butterfly Garland Fairy Christmas Outdoor Garden Party Solar led Decoration Light (White) Solar led decoration light,Convert solar energy into electric energy and stored in the battery. The independently operating lights have an average run time of up to ten hours depending on weather condition. Suitable for indoor and outdoor decoration with trees wreaths, etc. It is waterproof,you can put it outdoor in the rain,but DONT put it underwater. Note:Panel must be in dark/dim environment for the lights to come on (simply cover the solar panel to turn on light in brighter environment after power is charged).