Description Echo Round 3.5 blends the benefits of T5 and T5HO fluorescent lamps with a compact housing, integral ballast and efficient optical design. A wide variety of mounting, shielding and lensing options are available to provide the versatility to solve numerous lighting application challenges. Features Thermally protected ballast.Extruded aluminum housing.Cast aluminum end caps.Stainless steel external fasteners.Field adjustable housing.95% reflective 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 Wet LocationsFluorescent versions utilize a gasketed snap-tight acrylic lens.Aluminum cover fits over a standard 4" octagonal junction box.Meets NEC 410.73 double-ended, fluorescent lamp ballast disconnect requirements.