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 Extruded aluminum housing.Cast aluminum end caps.Hub mount supplied with round canopies.Aluminum cover fits over a standard 4" octagonal junction box.Stainless steel external fasteners.Field adjustable housing.95% reflective aluminum reflector.Thermoset polyester powder coat finish standard.Integral electronic ballast.Housing and mounting components painted to match, unless otherwise specified.Ballasts minimum start temperature is 0° F.Thermally protected ballast.Class "A" sound rated ballast.UL listed (US and Canada) for Wet LocationsLocks in desired orientation.Fluorescent versions utilize a gasketed snap-tight acrylic lens.Meets NEC 410.73 double-ended, fluorescent lamp ballast disconnect requirements.