As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT UPON ARRIVING AT THE AIRCRAFT, THE EMERGENCY LIGHT CIRCUIT BREAKER WAS POPPED AND THE FORWARD HALF OF THE EMERGENCY LIGHTS WERE ON AND THE BACK HALF WERE NOT. MAINTENANCE REPLACED THE NUMBER 1 EMERGENCY LIGHT BATTERY. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.