What was found
FLIGHT ATTENDANT SMELLED ELECTRICAL ODOR IN MIDDLE OF THE CABIN. NOTIFIED CAPTAIN, DETERMINED PROBLEM TO BE LT CABIN LIGHTS. TURNED OFF THE LH LIGHTS AND THE ODOR STARTED TO DEMINISH. CREW ELECTED TO DIVERT TO PIT. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AIRCRAFT AND FOUND NR 7 LT BALLAST UNIT DEFECTIVE. REPLACED BALLAST UNIT IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-21-21. OPERATIONAL CHECK GOOD AND AIRCRAFT RETURNED TO SERVICE.