As a curious lighting kid of the 1970's, at a local shopping mall one of the poles was taken down. It was a round 5 foot ball. The center of the ball perimeter it has small circles maybe half inch diameter in a row circling the perimeter at the widest part of the ball fixture. There were 4 cutouts at 45 degree angles downward,  the openings and reflectors may have been for 4 400 watt mercury vapor bulbs, or bigger. It was fascinating to see inside looking thru the small perimeter holes. There was only 1 of these poles with this fixture.  It sat along the mall wall for a few months than vanished. The remainder of the mall was lit with double davit steel streetlight poles with fluorescent fixtures. The mall opened in 1959. Has anyone seen one of these space age round fixtures?