NIGHT OPERATION HAD NMAC WITH SMT. NO TRAFFIC ADVISORY GIVEN.

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WE WERE ON A RADAR VECTOR BY CLT APCH CTL ON A HDG OF 340 DEGS; DSNDING FROM 9000-6000'. WE WERE #8 FOR LNDG ON 36L AT CLT AND HAD SEVERAL ACFT LIGHTS IN SIGHT. ONE SET REMAINED AT OUR 2 O'CLOCK POS FOR SOME TIME. IT WASN'T UNTIL THE ACFT WAS IN CLOSE THAT WE REALIZED THAT WE WERE ON A COLLISION COURSE. WE WERE AT 8500' ON A 340 DEG HDG; THE OTHER ACFT ON ABOUT A 250 DEG HDG AT OUR ALT. WE TURNED LEFT AND INCREASED OUR DES. HE APPEARED TO CLB. I ESTIMATED THE OTHER ACFT PASSED ABOUT 300' DIRECTLY OVER US. WE ASKED APCH CTL ABOUT THE TARGET AND HE SAID HE DIDN'T PICK UP HIS ALT READOUT UNTIL AFTER HE PASSED US. JUST PRIOR TO THE INCIDENT I WAS GOING TO INQUIRE ABOUT THE ACFT AT OUR 1 O'CLOCK POS; BUT THE FREQ WAS SATURATED. WE HAD OUR INBOARD LNDG LIGHTS AND RWY TURNOFF LIGHTS ON AT THE TIME. THE OTHER ACFT ONLY HAD HIS RUNNING LIGHTS ON. JUST AS WE CONVERGED; HE TURNED HIS LNDG LIGHTS ON; GIVING US A GOOD PICTURE OF HIS HDG AND ALT. HE WAS CLOSE ENOUGH AT THAT TIME TO TELL THAT HE WAS A LIGHT TWIN ENG ACFT. HIS LACK OF LNDG LIGHTS LED US TO BELIEVE HE WAS TFC FLYING PARALLEL TO US SINCE THE RED AND GREEN RUNNING LIGHTS WERE NOT THAT VISIBLE WITH HIS WHITE STROBES ON. THE OTHER ACFT MUST HAVE HAD A TRANSPONDER FOR APCH CTL TO GIVE US HE ALT READOUT; YET HE WAS NEVER POINTED OUT TO US. SUPPLEMENTAL INFORMATION FROM ACN 82540: THE #1 F/A SAID SEVERAL PAX ON THE RIGHT SIDE SAW HIM PASS OVERHEAD.