What was found
AIRCRAFT WAS ON APPROACH TO BVR, SELECTED GEAR DOWN, HAD NO GREEN LIGHT ON LEFT MAIN GEAR, DID A FLY-BY, TOWER REPORTED GEAR DOWN BUT NO LANDING LIGHT. AIRCRAFT LANDED. WHEN LANDING, AS SOON AS AIRCRAFT TOUCHED DOWN, LEFT GREEN LIGHT CAME ON. MAINTENANCE FOUND LEFT DOWN AND LOCK SWITCH DEFECTIVE. REPLACED AND GEAR TEST WAS NORMAL. ALL LIGHTS NORMAL.