Delta Photoluminescent Tape glows in the dark. Tired of fumbling around in darkness trying to find that squeegee, tray or print tong? This tape is your answer. Mark your work drawers with this tape and never have to remember where they are. Place it on the floor and use it as a guide to find your way around a dark lab. This is a simple, safe and cost-effective way to streamline your darkroom and make it more efficient.