... room's sight, is can lastly light and glow in the dark around 4-24hours. It can be used without electric power ... product is non-toxic, harmless, radioactiveless, free of maintenance, easy to be set, safe and reliable. Acrylic type light film can ... the surface.Application: Fighting, marine safety signs, subway and general guiding, making signs doorplate and so on. DIN67510 Certificated Glow in the dark ...