T.R.U. PGD-6 Glow In The Dark Tape: 3 in. wide x 30 ft. length (Luminescent Lime Green). Photoluminescent Neon Green Tape. Glow Properties: 6+ hours The luminescent system used is non-radioactive and non-toxic Used for - identification of critical equipment controls, light switch covers, exit and directional signage  especially for escape routes and stairways. Tape clearly labels safety equipment and provides a safe, illuminated path through stairwells, halls, rooms, and other potentially hazardous areas. Simple and inexpensive to install position, peel off backing, and adhere, this safety system requires virtually no maintenance. Used in - hotels, hospitals, schools, public facilities, office buildings and manufacturing plants - wherever people need a safe, reliable high and low-level egress pathway in case of an emergency, such as sudden power outages or the spread of smoke. Product has excellent resistance to UV light and does not show significant degradation when used outdoors.