B-324 BradyGlo™ material is a glow-in-the-dark (photoluminescent) pressure sensitive polyester. B-324 is ideal for exit and directional signs, identification of fire alarms and extinguishers. Photoluminescent material charges in 5 minutes at 1000 Lux for 10+ hours of glow time. Consistent glow life and unlimited rechargability. Service temperature of -40 to 176° F.