Description Echo Round 9.0 is designed to address larger, high-ceiling spaces such as atriums, gymnasiums, libraries, natatoriums and open offices. Its vast lamping range and premium light control provides sufficient and visually uniform illumination to surfaces. Round's proportionate size and basic shape integrates seamlessly into a space. Features Formed steel yoke bracket(s).Extruded aluminum housing.Cast aluminum end caps.No visible fasteners.Locks in desired orientation.Field adjustable housing.Aluminum cover fits over a standard 4" octagonal junction box.Luminaires over 27" in length have a two-piece yoke assembly.Housing and mounting components painted to match, unless otherwise specified.Thermoset polyester powder coat finish standard.Fluorescent versions have 85% reflective, low-iridescent, specular aluminum reflector.Thermally protected ballast.Class "A" sound rated ballast.UL listed (US and Canada) for damp location. (Not recommended for exterior use)Meets NEC 410.73 double-ended, fluorescent lamp ballast disconnect requirements.