How long do the emergency lights last on the CRJ 550?

The emergency lights on the CRJ 550 are designed to last for a duration of 20 minutes. This duration is sufficient to provide illumination for the cabin and the emergency exits in the event of a power loss, ensuring that passengers and crew can evacuate safely. The 20-minute timeframe strikes a balance between providing adequate time for an emergency response while also considering the weight and power consumption of the emergency lighting system.

This design reflects regulatory requirements and safety considerations, as it allows for an effective evacuation process under various emergency scenarios. Understanding the function and duration of emergency systems such as lights is crucial for both safety and operational preparedness on the aircraft.