What happens to the emergency lights during a total power failure?

During a total power failure, the emergency lights illuminate using their own battery power. This is an important safety feature designed to provide illumination in the cabin and emergency exits when the normal electrical system fails. Emergency lighting systems are equipped with backup batteries that automatically activate in the event of a total power loss, ensuring that the crew and passengers have a means of visibility to safely evacuate or find emergency exits.

The functionality of these emergency lights is crucial during emergencies or situations where primary power sources are unavailable, as they guide occupants in low-light conditions. The reliance on battery power for emergency lighting underscores the importance of these systems in maintaining safety and aiding evacuation procedures.