If so, you may want to consider using the Dynaming Solar Flame Post Lights instead. Designed to fit 4x4, 5x5, or 6x6 wooden posts, hundreds of reviewers gave these post caps a five-star rating ...

If you go for a solar option, fence cap lights are easy to install. Many don't even require any screwing in or hammering, and either slot over the top of the fence post or adhere on with sticky tape.