Exit Marking 2 : Any visible sign that indicates access to an exit, or identifies any other opening that could be mistaken for an exit that is not an exit
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}