Provided with CEE-listed energy-saving ballasts, Computer-designed, 3" nominal precision-cell parabolic louver, Die-formed, para-contoured body with stiffeners for rigidity, Louvers available in white or silver semi-specular finish, Positive cam latch, safety lock T-hinges allow hinging on either side, Floating louver with black reveal, Efficient air-handling options with or without air control vanes, Four auxiliary fixture-end suspension points provided, Unique louver tannenbaum design option