How long do the emergency lights last on the CRJ 700?

How long do the emergency lights last on the CRJ 700?

• A. 10 minutes
• B. 20 minutes
• C. 30 minutes
• D. 40 minutes

Answer: (B)

Emergency lighting duration is the time the system stays illuminated after loss of normal power to guide people to exits. For the CRJ 700, the emergency lighting is designed to operate for 20 minutes on battery power, providing aisle lights, floor proximity lighting, and exit signs during that outage. This duration is chosen to cover the evacuation needs during a typical incident and matches the aircraft’s emergency power system design. Shorter durations like 10 minutes would not meet the CRJ 700’s certification expectations for this system, while longer ones such as 30 or 40 minutes exceed what the onboard power sources are configured to support, so 20 minutes is the correct specification.

Emergency lighting duration is the time the system stays illuminated after loss of normal power to guide people to exits. For the CRJ 700, the emergency lighting is designed to operate for 20 minutes on battery power, providing aisle lights, floor proximity lighting, and exit signs during that outage. This duration is chosen to cover the evacuation needs during a typical incident and matches the aircraft’s emergency power system design. Shorter durations like 10 minutes would not meet the CRJ 700’s certification expectations for this system, while longer ones such as 30 or 40 minutes exceed what the onboard power sources are configured to support, so 20 minutes is the correct specification.