Brady 90616 10" Height, 14" Width, B-324 Polyester, Green On Red Color Glow-In-The-Dark Exit And Directional Sign, Legend "Emergency Exit Only" Brady's photoluminescent signs are designed for safety instructions and egress during power outages and emergency situations Photoluminescent markings require no electricity, they have lower installation costs (no re-wiring), no operating costs (no electricity or batteries) and are virtually maintenance free Brady offers a wide variety of photoluminescent door signs which are immediately visible in emergency situations, expected service life of adhesive and printed legend is average of 5 years In accordance with ASTM 2030-99- recommended uses of photoluminescent safety markings and not recommended for outdoor application Brady B-324 is a non-toxic, non-radioactive, explosion safe (does not generate energy to induce explosions) material allowing for sanitary disposal