Smart Solar 3747WR20 Metal Star 20 White LED String Light, Includes Rechargeable Ni-MH Battery For Up To 8 Hours Of Illumination Each Night 177"L x 1.25"W x 3.50"H Ideal for decorating shrubs, umbrellas, doorways, pergolas, trees, etc Powered by a separate solar panel allowing lights to be placed in shady areas Automatically illuminates during darkness Up to 8 hours of light each night when fully charged Replaceable, rechargeable Ni-MH battery No wiring, simply install and enjoy No operating costs