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 9.5 in. H
Item Weight: 2 lb.
Lamping: 1 x 100W Medium, Not Included