B737-300 SUFFERS FAULTY GEAR WARNING LIGHTS.

Narrative

WHEN THE GEAR WAS EXTENDED FOR APCH; THE NOSE GEAR GREEN LIGHT DID NOT ILLUMINATE. I QUICKLY CHANGED ONE OF THE LIGHT BULBS WITH A WORKING MAIN GEAR LIGHT BULB. I ALSO TESTED THE LIGHTS WITH PUSH-TO-TEST AND TEST SWITCH. THE GREEN LIGHT WOULD NOT ILLUMINATE. THE RED NOSE GEAR LIGHT WAS EXTINGUISHED. THEREFORE; AS I RECALL; THE NOSE GEAR WOULD BE DOWN AND LOCKED. HOWEVER; I HAD ENOUGH FUEL TO BREAK OFF THE APCH AND MAKE SURE BEFORE LNDG. I GOT THE FLT MANUAL OUT AND RAN THE CHKLIST; PUT THE GEAR DOWN AND CHK THE DOWN LOCK THROUGH THE NOSE GEAR VIEW PORT. THE RED LINES WERE LINED UP. I NOTIFIED TWR THAT WE WERE READY FOR THE APCH AND ANTICIPATED A NORMAL LNDG. TWR ASKED IF WE WANTED THE TRUCKS AND I SAID YES ONLY AS A PRECAUTION THAT WE ANTICIPATED A NORMAL LNDG. TWR ALSO ASKED FOR SOULS ON BOARD AND FUEL ON BOARD. I CONTACTED THE LEAD FLT ATTENDANT AND GAVE A QUICK EXPLANATION OF WHAT IT WAS; WHAT TO EXPECT (NORMAL LNDG); BUT BE READY; AND HOW LONG TO LNDG. WE LANDED WITHOUT INCIDENT AND TURNED OFF AT TXWY. I THEN TALKED TO MAINT AND DISPATCH ON THE PHONE AND FOUND OUT THAT I BELIEVE THE TWR HAD DECLARED AN EMER FOR US. I TOLD DISPATCH THAT WE HAD NOT OFFICIALLY DECLARED AN EMER.