LITHONIA L2SP82 A2 LENS ONLY-213/4X2113/16 L25P82 A12 U LENS COVERS ONLY
Retail Price: $29.99→$15.00 (50% Off)
Dimensions: 21 ¾ inches by 21 13/16 inches 
Compatibility: fits with 2x2 recessed troffer fixtures from Lithonia Lighting