NOTE: The Passenger Cabin Emergency Lights Switch located
on the Aft Attendant panel illuminates all emergency lights and
bypasses the flight deck control.
OFF – Prevents emergency lights system operation if the
airplane electrical power fails or is turned off.
ARMED – (normally the guarded position) all emergency lights
illuminate automatically if the airplane electrical power to DC bus
No. 1 fails or AC power is turned off.
ON – All emergency lights illuminate.