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 Enclosed magnetic ballast.Extruded aluminum housing.Cast aluminum end caps.Field adjustable housing.Locks in desired orientation.Cantilever arm mount utilizes yoke bracket with 1" steel arm.Aluminum cover fits over a standard 4" octagonal junction box.Flush-mounted fasteners.95% reflective aluminum reflector.HID and tungsten halogen versions have tempered glass lens.Housing and mounting components painted to match, unless otherwise specified.Thermoset polyester powder coat finish standard.Remote ballast in HID versions.Thermally protected ballast.UL listed (US and Canada) for damp location. (Not recommended for exterior use)