this photoluminescent/ contrast black obstacle 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 obstacles that protrude into your egress path, like pipes and fire hoses. 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.