Open aperture design with fully luminous interior. No horizontal lenses or diffusers. Precision machined clear anodized, extruded aluminum. Seven endcap options, preinstalled for perfect fit and finish. Up to 15ft o.c. spacing, delivering 35 fc at less than 0.37 W/ft.sq. Direct and direct/indirect general area lighting versions. Also available in vertical surface illumination (VSI) symmetric and asymmetric distributions.