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Photoluminscent Glow in the Dark Exit Signs Photoluminescent exit signs are a type of exit sign that use photoluminescent materials to glow in the dark. These materials absorb and store energy from ambient light sources during the day, and then release that energy as light during power outages or other emergency situations. Photoluminescent exit signs are useful in situations where traditional electric exit signs may not be able to function, such as during a power failure or in a smoke-filled room. Photoluminscent Exit Signs Glow in the Dark Exit Signs They are also energy efficient and do not require wiring...