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Photoluminescent signs consume no power and have an operational life of 30+ years. Hybrid Photoluminescent Exit Signs consume as little as 0.74 W of power. LEC signs are also called electroluminescent (EL), only consuming 1/4 W of power, and have an operational life of 30+ years which far exceeds the typical 10-year life of an LED sign.
Photoluminescent materials for temperature detection. In phosphor thermometry, the temperature dependence of the photoluminescence process is exploited to ...
Tritium, LED, and photoluminescent exit signs all have pros and cons. Photoluminescent technology is an excellent choice for many exit-sign applications... LED exit signs and other electrically based technologies rely on emergency generators, battery back-ups, and light bulbs - all of which can fail during an emergency.
Starting in 2009, the International Fire Code required structures over 75 feet (23 m) to have exit paths and stairway steps marked by a luminous path to guide people evacuating to the exit. A way of satisfying this requirement is photoluminescent tape, which glows in darkness without any external power source. [2]
The more tritium is initially placed in the tube, the brighter it is to begin with, and the longer its useful life. Tritium exit signs usually come in three brightness levels guaranteed for 10, 15, or 20-year useful life expectancies. [5] The difference between the signs is how much tritium the manufacturer installs.
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