Accuform PLW145RD 8 3/4" x 15 1/2" UltraGlow Photoluminescent "Exit" Sign, Double-Face Mounting Brackets Plastic

Ultra-Glow™ Exit Signs store energy from virtually any artificial light source. When properly charged, Ultra-Glow™ Signs will glow for over six hours in the event of a blackout. Low-profile, non-radioactive signs can be used for both high-level and low-level applications, and require no electrical hook-up.