2 Pack Solar Powered Copper Outdoor Garden Deck Patio Fence Pathway Post Light for 4x4 Wood Posts Smooth & durable weather resistant surface is perfect for handling the natural elements Brilliant white LED bulb has a life expectancy of over 100,000 hours Each light includes a 600mAh AA Ni-Cd battery that's recharged by the natural power of the sun 100% Solar powered no external wiring necessary Product Dimensions - 5.75" x 5.75" x 4.5", Base Dimensions: 4" x 4" Post Size Fitting; for Wood or Composite Posts the post size must be smaller than 3-13/16" square; can also be used on a Hollow Vinyl/Plastic Posts but the inside opening must be larger than 3-15/16"