The Lumenite Light Sleeve from Hyline Safety complements facilities’ existing fluorescent lighting fixtures, offering a fail-safe light source in the event of a blackout or other power loss. Made of LEXAN® polycarbonate resin, the sleeves instantly provide low-level emergency lighting when needed. They are charged for a minimum of 8 hours of passive power-free fail-safe illumination.Hyline Safety, New York, NY.