Anyone considering exterior lighting will look at bulkhead lamps at some point. We looked long and hard for the best we could find and discovered this. It is cast in heavy marine-quality brass and aged carefully. The lens is made of glass and all of the waterproofing is taken care of by silicon rubber gaskets and glands. It is supplied with a cast protective grille. It measures 8 inches in diameter and stands about 4 inches from the wall.