What was found
(CAN) DURING CLIMB, SMOKE WAS NOTICED IN THE CABIN AREA. CABIN FIRE EXTINGUISHER WAS DISCHARGED IN GENERALAREA OF SMOKE. NO OPEN FLAMES WERE NOTICED. AFTER LANDING MAINTENANCE INVESTIGATED AND FOUND THAT T HE SOLID STATE POWER SUPPLY FOR AN OVERHEAD FLOURESCENT LIGHT HAD HAD AN INTERNAL SHORT. THERE WAS NO DAMAGE TO ADJACENT STRUCTURE INSULATION OR WIRING. POWER SUPPLY WAS REPLACED WITH NEW PART. SYSTEMWORKED NORMALLY.