Abstract: A lighting fixture including a housing having sidewalls and lengthwise ends, an elongate lens fitted to the housing with lengthwise end edge portions, a pair of unitary endplates each attachable to either lengthwise end of the housing, each endplate having lens support structure supporting one lengthwise end edge portion of the lens, and each endplate having perimeter surfaces matingly attached to an endcap having a peripheral edge of substantially the same size and contour as the outer surface of the endplate where the endcap and endplate join. Each unitary endplate includes perimeter surfaces matingly attached to a linear bridge, an angular bridge or an endcap having a peripheral edge of substantially the same size and contour as the outer surface of the endplate where the bridge or endcap and endplate join. The endplate support prevents the elongate lens from being pressed inwardly into an interior portion of the lighting fixture.