What was found
PILOT REPORTED THAT DURING NIGHT TRAINING FLIGHT, THE ODOR OF SMOKE WAS NOTED IN THE CABIN. NOTED SMOKE COMING FROM OVERHEAD LIGHTS. PILOT PERFORMED "CABIN ELECTRICAL FIRE OR SMOKE" MEMORY ITEMS, CONTACTED ATC, AND LANDED WITHOUT INCIDENT. UPON INSPECTION, THE OVERHEAD LIGHT DIMMER ASSEMBLY WAS R & R IAW MM.