this photoluminescent wall & handrail marking tape absorbs and stores energy from ambient light. It is immediately visible in a sudden black-out or underneath smoke. Intended for indoor applications, it may be used on the wall in low location to outline your egress path, on exit door frames, on push bars and on handrails. This wall tape is ul1994-listed: “standard for luminous egress path marking systems”. Ibc / ifc code compliant. The tape has a smooth surface and an adhesive backing. Easily cut to size using scissors. Important: install on wet-cleaned, dust-free, dry smooth surfaces, using a pressure roller.