Whether there is a fire, power outage, or other emergency in your building, safe and efficient evacuation for building occupants is key. A photoluminescent egress system is powered only by the ambient light it absorbs, the markings then re-emit that light, glowing in the dark when the power fails, and the lights go out. It is important to understand that photoluminescent products must be exposed to ambient light of a minimum intensity and type for a set period to absorb enough energy to store for later.
The National Fire Protection Association’s Life Safety Code defines photoluminescence as “having the ability to store incident electromagnetic radiation typically from ambient light sources and release it in the form of visible light.”
In other words, photoluminescent material absorbs the energy provided by visible and near-visible light and then releases that energy at some later time, also in the form of light.
