What is the illumination duration provided by the Emergency Lighting System?

What is the illumination duration provided by the Emergency Lighting System?

• A. 5 Minutes
• B. 10 Minutes
• C. 15 Minutes
• D. 20 Minutes

Answer: (B)

Emergency lighting duration is the time the cabin lights stay illuminated after normal power fails, to help passengers find exits during an evacuation. For the CRJ-550, the system is designed to provide illumination for 10 minutes. This duration ensures you can see aisles, signs, and steps long enough to reach a safe area even if power is out. Shorter durations, like 5 minutes, wouldn’t reliably cover a full evacuation under some conditions, while longer durations such as 15 or 20 minutes are not the specified design for this aircraft’s emergency lighting.

Emergency lighting duration is the time the cabin lights stay illuminated after normal power fails, to help passengers find exits during an evacuation. For the CRJ-550, the system is designed to provide illumination for 10 minutes. This duration ensures you can see aisles, signs, and steps long enough to reach a safe area even if power is out. Shorter durations, like 5 minutes, wouldn’t reliably cover a full evacuation under some conditions, while longer durations such as 15 or 20 minutes are not the specified design for this aircraft’s emergency lighting.