The modern yet elegant Imperial Solar Post Cap offers a clean contemporary design that is unequalled in performance. Its rugged cast aluminum construction with powder coated finish means no future painting. The Imperial will fit over an actual 4"x4" or 3.5"x3.5" post (3.5"x3.5" adaptor included) High Performance solar lights - stays lit for up to 10 hours Lights up automatically every night / auto - off switch High output surface mount LED technology for brilliant white light - 3x brighter than standard LEDs 1 long life AA Ni-MH rechargeable battery included 1 long life AA Ni-MH rechargeable battery included Will fit over an actual 4"x4" or 3.5"x 3.5" post (3.5"x3.5" adaptor included) Quick and easy Do It Yourself installation. 15 Lumens / 4500-5500 Kelvin Patent No: D624,227 S Download our Instruction Manual