No more stumbling in the dark! This set of 2 Post Cap & Deck Railing Lights are great for everything from accenting decorative elements of your deck, to illuminating dark paths and fencing. Whether you are trying to show off your deck or prevent trips and falls, these get the job done. The lights are powered by integrated solar panels and come with 1 rechargeable AA Li-ion battery for each light that are charged daily by the solar panels. There is no need to run any electricity to the unit or to buy batteries. Requires 8 hours of charge time for up to 8 hours of illumination. These post cap lights can be mounted to almost any standard 4x4 wood fence post or deck or be mounted to any 4x4 or 6x6 fence post.