Completely sealed with double gasketed glass (between glass & reflector and glass & frame) for an air-tight seal. Swing Stop? retention cable keeps glass from abruptly swinging down. Captured thumb screws & closure mechanism for ease of use and excellent sealing. Highly reflective aluminum interior offers excellent reflectivity and diffusion. Integrated air-cooled fittings with bead ring. Powder-coated galvanized steel housing. EZ Breeze? aerodynamic junction box. US Patent: D698,628.