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 Flush-mounted fasteners.Thermally protected ballast.Formed steel yoke bracket(s).Extruded aluminum housing.Cast aluminum end caps.Field adjustable housing.Locks in desired orientation.Luminaires over 27" in length have a two-piece yoke assembly.Steel cover fits over standard 4" octagonal junction box.Fluorescent versions have 85% reflective, low-iridescent, specular aluminum reflector.Housing and mounting components painted to match, unless otherwise specified.Thermoset polyester powder coat finish standard.Integral electronic 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.