Frequently Asked Questions ?
What is photoluminescence?
Photoluminescence is a special kind of luminescence.
In fact the word photoluminescence covers any material that will absorb light energy and then release that energy in the form of light.
There are two types of photoluminescence; fluorescence and phosphorescence.
Fluorescent materials absorb light and then emit light instantaneously at a different wavelength.
Phosphorescent materials absorb light of short wavelength and then emit light slowly over time also at a different, longer wavelength.
Typical safety grade phosphorescent materials absorb in the UV, Blue region (300 - 450nm) of the spectrum and emit in the yellow green (500- 600nm).
JALITE materials are covered by the technically correct term phosphorescent.
The energy needed to activate it is supplied by common light sources such as daylight, ordinary tungsten filament and the most effective fluorescent lights with a high colour temperature.
Under sudden power loss situations, the material immediately appears very bright and is conspicuous at a distance, providing an effective, bright contrast for text and graphical symbols and ensuring that safety messages are quickly recognised.
This assists people to orientate themselves so that they can react effectively and evacuate efficiently.
JALITE materials are designed specifically to maximize both high initial brightness and persistance. Furthermore, as for the flagship product JALITE AAA they can be charged easily at low illumination and with short exposure times to light energy.