Fence post cap solar lights are a great way to accent your fence post, deck post or mailbox post.  A set of 4 for inner post mount of 5" x 5". They will help your visitors to spot your fence line, home or driveway.  Made of durable white plastic and are water and corrosion resistant.  Add warm solar powered lighting and no wiring needed.  The rechargeable batteries are charged by the power of the sun during the day to power the 2 ultra bright LED lights at night for up to 8-10 hrs.