In 2000 the NFPA Life Safety Code was updated and now recognizes certain Photoluminescent Exit Signs as an alternative to internally lighted electric powered signs. A photoluminescent exit sign absorbs light from an activation light source in order to emit light (that is, luminescence). The photoluminescent exit sign continues to emit light for a time after the activation light source has been removed.
Photoluminescent Exit signs are in the category of an Internally Illuminated Sign. The photoluminescent exit signs are permitted, provided they are listed in accordance with UL 924, "Standard for Safety Emergency Lighting and Power Equipment" and meet all the requirements outlined in the criteria from the Life Safety Code 101, 2006 edition parts 7.10.7.2. Our product line meets the requirements set forth by the ICC in the International Building Code (IBC). To purchase our photoluminescent exit signs please click here.
Requirements for Exit Sign Illumination
NFPA 101 defines the methods of illumination for exit signs:
Externally illuminated - the light source is contained outside of the device or legend that is to be illuminated. The light source is typically a dedicated incandescent or fluorescent source;
Internally illuminated - the light source is contained inside the device or legend that is illuminated. The light source is typically incandescent, fluorescent, electro luminescent, light-emitting diodes, or photoluminescent;
Photoluminescent Exit Sing - the sign is illuminated by self-contained power sources and operates independently of external power sources. (Batteries do not qualify as a self-contained power source.)
Photoluminescent Exit Sign - The face of the photoluminescent exit sign sign must be continually illuminated while the building is occupied. The face of the photoluminescent exit sign shall be illuminated according to its listing from the face of the sign. The illumination has to be a reliable source as determined by the Authority Having Jurisdiction, AHJ. The AHJ is the ultimate arbiter concerning safety practices and safety equipment for a particular locality. The charging light must be of the same type that is specified on the sign.
Photoluminescent Exit Signs and Photoluminescent Egress Path Markings need a specific type of light and a minimum level of light on the face to assure that the sign will be able to provide adequate illumination in an emergency situation. During illumination the sign shall not be connected to an automatic timer.

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NightBright USA UL 924  Photoluminescent Exit Signs

The smart sustainable solution for all your Photoluminescent Exit, Emergency Evacuation and Safety signage needs.  In an emergency situation, life or death is often determined by the crucial decision of which direction to head for safety.  This critical decision has to be made in a matter of seconds, and every inch of the path directly affects the final outcome.  NightBright USA Photoluminescent Exit Sign Technology provides the longest most reliable, luminous and unambiguous exit path during a natural or man-made disaster resulting in fires and/or black-outs.  NightBright USA photoluminescent exit signs  glow in the dark and reduce panic by providing directional way finding, and points of reference instilling confidence, minimizing injuries and speeding up evacuations. Our Photoluminescent  Exit Signs only require 5 foot candle of ambient lighting to charge, and they will continue to glow the code required time with an intense afterglow sufficient to meet the UL 924 Standard requirements.  Not all Photoluminescent Exit signs are created equally.  To make sure that you are meeting the code requirements for photoluminescent exit signs, select a Photoluminescent Exit Sign that is listed and recognized by a reputable third party inspection company.  Our Photoluminescent Exit Signs are listed and are marked with the Trusted ETL mark that displays the code compliance to the UL 924 Standard.

​​​​Code Compliance: NFPA - IBC - OSHA - IFC - ICC

Code Approved: UL 924 - UL 1994 - ASTM 2072 - M.E.A.

​​Photoluminescent Exit Signs