... Free of toxic, radiation, harmful material Widely using Luminous signs , glow in the dark place after being charged by ... light, the wisest choice for safety signs application.1. Easy to useSelf adhesive, to tear off ... to give luminous.-20~120oC, 0~100% humidity, the signs remain the same character.7. Wide applied fieldsEscape directions, ... a suitable stick-to surface, it may be fixed.