DIRECTION SIGNS-GLOW IN DARK
Photo-luminescent is light emission from any form of matter after the absorption of photons (electromagnetic radiation). It is one of many forms of luminescence (light emission) and is initiated by photo execution (i.e. photons that excite electrons to a higher energy level in an atom. Photo-luminescent signs are also known as glow in the dark signs. we at hpd-signs carry all types of glow in the dark- photo-luminescent signage.
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