It is made of acrylic material,alkaline-earth aluminate and silicate which are activated by rare earth element.The products is non-toxic,non-radioactive and has stable chemical properties. Application: Fire fighting,marine safety signs,and general guiding and marking signs. Service life:Indoor 20 years, Outdoor 7 years. Specification:1.24x45.7m Type:FG600(10 hours/10 hours), FG240(4 hours/4 hours)