Isolite Universal Self-Luminous Exit Sign with Red Background and White Letters, 1 Side, 8-1/2" H x 14" W, 10 Yr. Warranty

This maintenance-free sign is easy to install, and has no lamps or batteries to replace. Phosphor-coated, tritium-filled glass tubes provide worry-free emergency lighting for up to 20 years. No electricity required. Featuring rugged ABS housing, the vibrationproof, spark-free unit is unaffected by extreme temperatures. It's ideal for damp, wet, and explosive-atmosphere environments. 10-yr. manufacturer's warranty.