Classroom Mood Filters 4/Set Whisper White - EI-1231 - Fluorescent lights are a staple in classrooms, but their harsh glare and flickering light can cause eyestrain, headaches, and anxiety in students. Cover your classroom fluorescent lights with these fabric panels that fit over standard ceiling fixtures with sturdy, sewn-in magnets. Each set includes four 2" x 4" heat-resistant panels in Whisper White. For use with fluorescent lights only.