2 x 4 LED center-basket troffers fit into 2-ft. x 4-ft. drop ceiling grids. This size is suitable for large classrooms, hallways, office spaces, department stores, or similar retail settings, and wide areas with few walls. Also known as volumetric fixtures, center-basket troffers feature a curved middle section that reflects light to disperse it across a wider area than a flat lens. It also softens lighting to reduce harshness.
https://www.grainger.com/product/LITHONIA-LIGHTING-Recessed-Troffer-4-ft-Lg-54ZY54?searchQuery=54ZY54&searchBar=true&suggestConfigId=6