What is the principle of luminous road photo photo luminescent powder

Questions: 

What is the principle of luminous road? What's the difference with the traditional road reflective logo? It really can save energy and replace street lights? 

Answer: 

According to media reports, the nature of the road is the photoluminescent powder‍ use of light-emitting a glow in the dark fluorescent powder to make signs, the roads automatic light. 

Road use light-emitting phosphors are long afterglow luminescent powder." Recently, Professor of Shanghai Jiaotong University Daide Chang told reporters that this material can absorb sun light during the day, at night and gradually release the green light. 

The material is sent only light in a dark environment, the eyes can be felt during the day feel." Professor of Chemistry and Molecular Engineering, East China University of Technology Shen Yongjia further explained to reporters, also called afterglow luminescent powder luminescent materials, in natural light irradiation, or other artificial light sources that can store energy of the external optical radiation, and at a temperature (room temperature) and for a long period of time to slowly release the stored energy in the form of visible light luminescent materials. 

It is understood that since has good luminescent properties, since the 1990s, luminous paint‍ long afterglow luminescent powder began to receive widespread attention, and began to apply at night signs, emergency lighting and light-emitting ceramic. 

In China, the ground reflective logo has been an important means of auxiliary lights. By car lights, the driver can generally see the road. Then, add the mark compared to the way long afterglow luminescent powder, both of which have anything different? 

Daide Chang said that the main difference between the two is that one is self-luminous, a passive reflector. "Active glowing effect to be significantly better than conventional reflective effect, traffic safety has been significantly improved." 

In addition, the effect of long afterglow luminescent powder, the report Photoluminescent Pebble‍ pointed out that it can continue to light in the dark eight hours, in order to protect the lighting needs of the night, you can replace the lights.