Brady 80273 3.5" Height, 10" Width, B-347 Plastic, Red On Green Color Glow-In-The-Dark Exit And Directional Sign, Legend "Emergency Exit" Brady offers many different exit/directional signs including bradyglo framed and frameless exit signs which are immediately visible in emergency situations Brady's safety signs use internationally reported pictograms and help promote greater communication of safety messages Brady B-347 is a non-toxic, non-radioactive, explosion safe (does not generate energy to induce explosions), material allowing for sanitary disposal Charge time of 5 minutes 1000 lux; Consistent glow life and unlimited rechargability throughout service life Substrate type is phosphorescent polyester film on polystyrene