A litmus test in chemistry is used to determine acidity; a lit-mesh test in lighting is used to determine light play factor. Really (even if Google disagrees). Lit-Mesh Test creates some amazing light patterns through its recycled stamped steel rectangles.
Hand-Forged Recycled Steel Mesh.
Finish: New Bronze
Dimensions: 7.25 in. W x 9 in. H x 4.5 in. Ext
Item Weight: 1.5 lb.
Lamping: 1 x 60W Medium, Not Included