As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT THE EMERGENCY LIGHTING DID NOT WORK WHEN TESTED DURING PREFLIGHT INSPECTION. THE ENGINES WERE RUN TO RECHARGE THE BATTERY PACKS AND AN OPERATIONAL CHECK OF THE LIGHTING SYSTEM WAS ACCOMPLISHED. THE EMERGENCY LIGHTS TESTED GOOD AND THE DISCREPANCY WAS CLEARED.