As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE PRE FLIGHT INSPECTION, THE CREW FOUND THAT THE EMERGENCY LIGHTS HAD BEEN LEFT ON OVERNIGHT AND THAT THE LIGHTS DID NOT WORK. MAINTENANCE REMOVED AND REPLACED THE ALL FOUR EMERGENCY LIGHT BATTERY PACKS. LIGHTS OPS CHECKED GOOD.