0.315" X 2' X 4' Black Egg Crate Diffuser - Great for reef aquariums at ePlastics
Egg Crate Light Diffusers - Make Great Light
Plaskolite 4 ft. x 2 ft. Suspended Egg Crate Light Ceiling Panel 1199233A - The Home Depot
Plexiglass Sheets, Fiberglass, UHMW, Polycarbonate & Engineering plastics: Black Egg Crate Diffusers for Aquariums and Lighting
Amazon.com: KastLite Egg Crate Panel 5-Pack in White | Polystyrene | Nominal 2' x 4' with 1/2" x 1/2" x 3/8" Cell Size | Manufactured by American Louver : Industrial & Scientific
Amazon.com: KastLite Egg Crate Panel 2-Pack in Black | Polystyrene | Nominal 2' x 4' with 1/2" x 1/2" x 3/8" Cell Size | Manufactured by American Louver : Industrial & Scientific