The Solar Powered Firefly String lights are a versatile set of solar powered micro LED lights mounted in a ultra thin wire strand making the wire amost invisable and ideal for decorating shrubs, parasols, trees and doorways. This set has 50 LED's which are powered by a separate solar battery station which has a total cable length of 4.9m. The solar panel has a 3 position switch to set either "On" / "Off" or "Flash". When in the "on" or "Flash" mode the lights will automatically illuminate at night giving light for up to 6 hours when fully charged. If however the switch is set to "Off" the solar panel will continue to charge, allowing you to charge over a few days to ensure maximum duration on a special occasion.