FLC OF AN ATX TURBOPROP COULD NOT OBTAIN GEAR DOWN INDICATION LIGHTS EVEN THOUGH THE GEAR WAS OBSERVED BY THE TWR TO BE DOWN. AFTER GOING THROUGH GEAR CHKLIST THEY LANDED AND THE GEAR WAS DOWN AND LOCKED. THE GEAR INDICATOR CIRCUIT BREAKER WAS POPPED BUT THERE WAS NO MENTION OF CHKING IT ON THE CHKLIST.

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AS WE FLEW OUR BASE LEG AND SELECTED GEAR DOWN; WE NOTICED OUR '3 GREEN' LIGHTS DID NOT APPEAR. QUICKLY; WE CYCLED THE GEAR AGAIN AND SAME OUTCOME OCCURRED; NO GEAR DOWN LIGHTS. WE FLEW A MISSED APCH AND VECTORS WHILE WE RAN THE EMER CHKLIST. THAT IS WHERE OUR PROB BEGAN. THE CHKLIST CALLED FOR EMER EXTENSION OF THE GEAR (PUMPING THE HYD SYS) BUT WE 'KNEW' THE GEAR WAS DOWN (WE HEARD IT). ALSO; WE VERIFIED GEAR DOWN BY MOVING PWR LEVERS BACK TO FLT IDLE (ONE AT A TIME) AND NO GEAR UNSAFE WARNING WAS HEARD. WE ALSO SET THE FLAPS TO 20 DEGS AND NO GEAR UNSAFE HORN WAS HEARD. THEREFORE WE WERE SATISFIED THAT THE GEAR WAS DOWN AND THE PROB WAS WITH OUR GEAR SAFE LIGHTS. NO EMER WAS DECLARED YET WE HAD ALL RESCUE VEHICLES STANDING BY AS WE LANDED. ANOTHER POINT (OUT OF SEQUENCE) IS THE TWR VISUALLY CHKED OUR GEAR; IT APPEARED DOWN. ONCE ON THE GND (ALL OK) WE NOTICED THE CIRCUIT BREAKER FOR THE GEAR LIGHTS WAS OUT. QUICK SIMPLE FIX -- THAT WAS THE PROB. MY CONCERN IS THAT WHILE UNDER THE PRESSURE OF FLYING THE ACFT AND FOLLOWING THE PROPER PROCS THERE IS AT NO TIME ANY REF TO THE CIRCUIT BREAKER. YES; WE SHOULD CHK THE CIRCUIT BREAKER. A GOOD IDEA; BUT NOT PART OF OUR TRAINED PROC. WE RAN ALL PROPER CHKLISTS AND EVEN SPOKE WITH OUR MAINT PERSONNEL. THERE WAS NEVER ANY MENTION OF A POPPED CIRCUIT BREAKER. MY SUGGESTION IS TO INCLUDE A CHKLIST FOR 'NO GEAR DOWN INDICATION' CHK CIRCUIT BREAKER; END OF LIST.