Fluorescent light fixture covers, also called lenses, are polycarbonate-plastic or acrylic pieces that fit on the bottom of a fluorescent fixture to hide the light bulbs and diffuse the harsh fluorescent light. Lenses may be flat or molded, depending on the design of the fixture.
Lenses are available in a wide variety of sizes, opacities, thicknesses and textures, ranging from smooth to prismatic to textured. Manufacturers also produce several types of films, which are applied to the surface of the lens, to achieve different lighting effects. In recent years, decorative and artistic lenses and films have been created. Decorative lenses enhance existing interior design, adding touches of elegance or whimsy to otherwise plain spaces.