Designed specifically for steel and aluminum posts. Adapters included to fit over an actual 2.5'x2.5', 2.25'x2.25' or 2'x2' post Choose between warm and bright white light modes - includes Warm/Off/Cool switch Lights up automatically every night High output surface mount LED technology 1 long-life AA Ni-MH rechargeable battery included Manufactured from durable cast aluminum with a Black powder-coated finish 10 Lumens / 4500 5500 Kelvin Patent No: D624,227 S