photoluminescent signs

Photoluminescent signs(for example Exit signs,warning signs,doorplates,traffic signs and etc.) are made of photoluminescent pigment,they can emit visible light automaically for more than 12hours in darkness after exposure to any visible light for only 10~30minutes.It's free of toxic,radioactive materials,and it's easy to be installed & maintained. 

• photoluminescent pigment