As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FINAL APP NOTICED SMOKE COMING FROM CAPT EXT LIGHT CONTROL PANEL. FLOOD AND WING LIGHTS ON, NOSE LIGHTS OFF. TURNED OFF ALL LIGHTS AND SMOKE CEASED. LANDED UNEVENTFUL AND TAXIED IN. REMOVED LT WING/NOSE LIGHT SW FOR ACCESS. FOUND LT WING LANDING LIGHT SW ARCED AT CASE. REPLACED SAME.