When should the flight attendant turn on the emergency lights during an evacuation?

The appropriate moment for the flight attendant to turn on the emergency lights during an evacuation is after the command "EVACUATE, EVACUATE, EVACUATE" is given by the Pilot in Command (PIC). This command signifies that an immediate evacuation is necessary and serves as a critical signal for crew members to initiate emergency procedures.

Turning on the emergency lights after this command ensures that the cabin is adequately illuminated, helping passengers navigate to the exits safely during an emergency situation, particularly when visibility may be compromised. This step is crucial since the lights assist in creating defined exit paths and guide passengers to evacuate efficiently.

The timing is essential, as activating the lights too early may not provide the necessary clarity needed for a smooth evacuation process once the order is given, and waiting too long could hinder the evacuation and lead to confusion among passengers. Therefore, executing this action following the PIC's directive underscores the importance of maintaining order and communication during emergency situations, maximizing safety for all onboard.