Classy Caps FBA_SL214W 5X5 White Aluminum Imperial Solar Post Cap, 5" x 5" Note: The hole has to be measured from the inside which is 5 inches 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 -3x brighter than standard led's Manufactured from durable Cast aluminum 1 long life AA rechargeable battery included