Photo-luminescent escape path lighting must be charged with the cabin lights on the BRT for how long prior to every flight?

The requirement for photo-luminescent escape path lighting to be charged with cabin lights on the BRT for 15 minutes prior to every flight is established to ensure that the escape path lighting is adequately charged and functions effectively in the event of an emergency. This charging time allows the luminescent material to absorb enough light energy, enhancing its brightness and visibility during low-light conditions or total darkness, such as during an evacuation.

Properly charged photo-luminescent lighting is crucial for guiding passengers safely to exits, helping to minimize confusion and panic during emergencies. Insufficient charging time could lead to dim lighting that may not provide clear guidance, jeopardizing passenger safety.

Other options, while they specify various charging durations, do not meet the regulatory or safety standards set for ensuring the photo-luminescent lighting is at optimal effectiveness. Therefore, 15 minutes stands as the required standard in this case, as it strikes a balance between efficiency and safety needs.