As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT CRUISE AND AFTER GOING THROUGH BRIEF LIGHT AND MODERATE CHOP, THE F/A'S NOTICED AN ACRID ELECTRICAL SMELL NEAR SEATS 16 DEF. AFTER THEY TURNED OFF THE CEILING LIGHT NIGHT MODE THE SMELL WENT AWAY NO SMOKE WAS EVER SEEN. MAINTENANCE REPLACED LIGHT ASSY AT SEAT 16 DEF CEILING LIGHT PER MM 33-22.