For approximately how long will emergency lights be powered during an emergency?

The emergency lights on an aircraft are designed to provide adequate illumination in the event of an emergency, ensuring safety during evacuation procedures. The operational duration of these lights is crucial for maintaining visibility in critical situations.

The correct answer is based on the standard design specifications for emergency lighting systems, which allow them to be powered for approximately 10 minutes. This duration is considered sufficient for most emergency scenarios, enabling passengers and crew to evacuate safely while minimizing the risks of accidents in low-light conditions.

This 10-minute time frame aligns with regulatory requirements and industry best practices, emphasizing the importance of having reliable and effective emergency lighting in place. Other durations, such as 5, 15, or 20 minutes, may not provide a realistic or practical framework for aircraft emergency lighting systems, as they typically aim to balance battery life with functional needs during emergencies.