How long do Photo-Luminescent Emergency Lighting last?

Photo-luminescent emergency lighting systems are designed to provide illumination in emergency situations, such as power outages or evacuations, by absorbing light and then emitting it when needed. The correct answer indicates that these systems can last for up to 3 hours, which is appropriate for the safety needs of passengers and crew. This duration ensures that there is ample time for individuals to safely navigate exits in low-light conditions during emergencies. The 3-hour capability reflects both the efficiency of the technology and the standards set for safety equipment in aviation, ensuring that enough time is allotted for effective evacuation. This reliability is crucial for maintaining safety in aircraft operations while addressing the potential need for longer-lasting illumination in emergencies.