Is the plastic cover on your under-cabinet kitchen light cracked, yellowed, or missing? This Beam Lighting replacement diffuser is here to help! It's a white, ribbed acrylic cover with a right-angle L-shape design that fits many standard under-cabinet fluorescent or LED light fixtures. The exact dimensions are 20-7/8 inches in length, 2-7/8 inches in width, and 1 inch in height – PLEASE measure your old cover or fixture opening carefully before ordering to ensure it's the correct size! It's made from durable, translucent acrylic that diffuses the light evenly, reducing glare and giving your kitchen a softer, more pleasant glow. Installation is usually a breeze – you typically just need to screw or snap it into place on the existing fixture housing. It's an easy and inexpensive way to refresh the look of your kitchen lighting or simply replace a broken part. Perfect for kitchens, workshops, garages, or any space with under-cabinet lighting.