As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH- DURING PREFLIGHT THE CREW NOTED THAT FOUR EMERGENCY LIGHTS ON THE FLOOR FAILED TO ILLUMINATE. IAH- MAINTENANCE PERFORMED A OPERATIONAL CHECK OF THE EMERGENCY LIGHTING SYSTEM, NO DEFECTS NOTED. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.