How long does the photoluminescent escape path last after being fully charged on the CRJ 700?

• A. Two hours
• B. Three hours
• C. Four (4) hours
• D. Five hours

Answer: (C)

Photoluminescent escape path lighting is a glow-in-the-dark system that stores energy from ambient light and then emits light in darkness to help you find exits without relying on electrical power. On a CRJ 700, once the material is fully charged, it will continue to glow for about four hours. This duration is set to ensure visibility during an evacuation if cabin lighting or power fails, giving you a reliable guide to exits for a substantial window of time. The glow gradually fades as the stored energy is used up, and you can refresh it by exposing the surfaces to light again. Shorter durations like two or three hours wouldn’t meet the intended performance, while five hours would exceed the expected spec.