Square shape is perfect for square growing areas (i.e. 4’x4’). Very uniform, square, intense light pattern. 8” integrated air-cooled fittings. Interior made from 95% reflective European aluminum. Completely sealed with neoprene gaskets and hinged glass. Pre-wired with lamp cord and socket. Galvanized steel housing with Dupont powder coated finish. Compatible with all Sunlight ballasts.