Your favorite blue light filters now also come with sun spiral patterns! These 2'x4' light filters create a calming atmosphere while diffusing the harsh glare and flickering of fluorescent lights. These revolutionary light filters are heat resistant and fire retardant, and attach to standard classroom ceiling fluorescent fixtures with 6 sturdy, sewn-in magnets. Our light filters meet NFPA701 fire safety standards. Come in 2-piece sets. Awesome!