"The modern yet elegant Imperial Solar Post Cap offers a clean contemporary design that is unequalled in performance. It’s rugged cast aluminum construction with powder coated finish means no future painting. Will fit over an actual 5"" x5"" post.• High output surface mount LED technology for brilliant white light – 3x brighter than standard LED’s• Lights up automatically every night / auto - off switch • 1 long life AA Ni-MH rechargeable battery included • Manufactured from durable cast aluminum with white powder coated finish• Will fit over an actual 5""x5"" PVC Post• Quick and easy Do It Yourself installation• 15 Lumens / 4500 – 5500 Kelvin• Patent No: D624，227 S"