As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION FOUND THE EMERGENCY LIGHT STRIP IN CABIN BY SEAT ROW 8, 9 & 10 WOULD COME ON AND FADE OFF WHEN EMERGENCY LIGHTS WERE TURNED ON. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED & REPLACED EMERGENCY BATTERY NR 3 IAW AMM 33-50-04. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.