As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ALL THE EMERGENCY LIGHTS CAME ON IN THE CABIN. WE CYCLED THE COCKPIT EMERGENCY LIGHTS SWITCH TO OFF/ARMED/ON TO NO EFFECT. PERFORMED EMERGENCY LIGHTS OPERATIONS CHECK PER AMM 33-51-00. ALL OPERATIONS CHECK NORMAL