Which statement best describes the Emergency Lighting System during an evacuation?

Which statement best describes the Emergency Lighting System during an evacuation?

• A. It is activated only when a power failure occurs.
• B. It provides full cabin lighting during normal operations.
• C. It is responsible for the main cabin lighting.
• D. It provides limited general lighting during an evacuation and includes exit signs at each exit; it is activated by loss of normal aircraft power.

Answer: (D)

During an evacuation, the priority is to illuminate the path to exits and clearly show where to go, even when the main electrical system has failed. The Emergency Lighting System provides limited general lighting to reveal aisles, steps, and obstacles, and it includes illuminated exit signs at every exit. It is powered independently from the normal aircraft systems and automatically activates when normal power is lost, ensuring visibility when cabin lights aren’t available. It isn’t meant to replace normal cabin lighting or to fully illuminate the cabin, but to safely guide passengers to exits. That combination—limited lighting plus exit signs activated by loss of normal power—best describes how the system works during an evacuation.

During an evacuation, the priority is to illuminate the path to exits and clearly show where to go, even when the main electrical system has failed. The Emergency Lighting System provides limited general lighting to reveal aisles, steps, and obstacles, and it includes illuminated exit signs at every exit. It is powered independently from the normal aircraft systems and automatically activates when normal power is lost, ensuring visibility when cabin lights aren’t available. It isn’t meant to replace normal cabin lighting or to fully illuminate the cabin, but to safely guide passengers to exits. That combination—limited lighting plus exit signs activated by loss of normal power—best describes how the system works during an evacuation.