Abstract: A system for making and providing a grid or louver system preferably for application in the lighting industry, wherein a single and substantially flat workpiece is cut or stamped from a blank to facilitate bending of portions thereof and the interlocking or intermeshing of it with a second workpiece which may be made in substantially the same or the same way.

Abstract: An adapter for facilitating mounting of lighting louvers in "T" rail lighting fixtures is provided. The adapter includes an elongated bar including a first flange extending laterally from an upright web portion and a second flange extending in an opposite direction of the first flange from the web. The bar is formed of a relatively flat, thin sheet metal material that is bent into the configuration such that one portion defines the first flange, another portion defines the upright web, and another portion defines the second flange. The first flange is of sufficient dimension to be received between the lighting fixture frame and the "T" rail. The fixture frame therefore secures the bar in place within the fixture opening. The upright web section includes means for receiving and mounting the lighting louver. The second flange functions to overlap a portion of the lighting louver and act as a light screen between the "T" rail and the peripheral edges of the lighting louver.