Honeycomb Grids give you studio-quality light control. These grids, designed by photographer/ inventor Dave Christensen, are constructed of expanded aluminum honeycomb and are painted black. Grid designations are 30, 60 and 90. Beam angles at 50% intensity are 25, 35 and 45 degrees. The Honeycomb Grid 60 is the most commonly used. Because of the hard grid's small hexagonal cell size and thin depth, the light cutoff is precise and the edge transfer is smooth and rapid with black grids and extended with white grids.