Sold as 1 Each. Light filter is used to lessen the brightness of fluorescent lights in the classroom, library, doctor office, and more. Perfect for any space with ceiling lights fluorescent or LED lighting like the office, hospitals, classroom, clinics, and studios. Great for home décor in the playroom or nursery. Light covers for ceiling lights reduce harsh glare and flickering lights that can cause eyestrain, headaches, even anxiety. Four panels fit over standard fluorescent and LED ceiling light fixtures with sturdy, sewn-in magnets, creating a soothing working environment. Includes four 2' x 2' heat-resistant Light Filter panels and Certificate of Conformance for flame retardancy.