AFTER BEING POORLY VECTORED TO THE APCH; AN ACR CREW FINDS THE RWY AND APCH LIGHTING SET AT DIFFERENT LEVELS.

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WHILE BEING VECTORED TO IRL LOC FROM THE SE AT 4000 FT MSL; WE RPTED THE FIELD IN SIGHT AND INFORMED TWR WE WOULD BE UNABLE TO DSND FROM OUR PRESENT POS. THEY INFORMED US THAT WE WERE 4.5 NM FROM FIELD; AT WHICH TIME WE REQUESTED VECTORS FOR THE ILS. WE WERE GIVEN A L TURN TO THE SW. AS WE TURNED AWAY FROM FIELD; I NOTICED THE RWY LIGHTS BEING STEPPED DOWN. THIS TIME WE WERE VECTORED IN FROM SW AT 4000 FT MSL. INSIDE WLE WE WERE CLRED TO 3000 FT AND SUBSEQUENTLY INSTRUCTED TO MAINTAIN 3000 FT UNTIL ESTABLISHED AND CLRED FOR THE ILS RWY 35L. APCHING CRDNL THE LOC WAS STILL FULL SCALE AND THE PAPI WERE INDICATING WELL ABOVE GS. AT THIS TIME WE DISCONNECTED THE AUTOPLT; TURNED FURTHER R TO INTERCEPT; AND ONCE ESTABLISHED THEN INTERCEPTED THE GS FROM ABOVE. AT THIS TIME THE PAPI AND APCH LIGHTS SEEMED UNUSUALLY BRIGHT OVER THE RWY LIGHTS. ALL WAS NORMAL DOWN TO THE FLARE DURING WHICH TIME I WAS LOOKING DOWN THE RWY AT THE CTRLINE LIGHTS AND NOT AT THE APCH LIGHTS AS THEY PASSED UNDER THE NOSE. AFTER TOUCHDOWN; I WAS INSIDE THE COCKPIT UNTIL MY 80 KTS CALL FOLLOWING WHICH THE CAPT ASKED ME IF THE RWY LIGHTS WERE ON. WHEN I LOOKED UP; THE RWY SEEMED VERY DARK. THIS I ATTRIBUTED TO THE DIFFERENCE OF INTENSITY BTWN THE APCH LIGHTS; COCKPIT EFIS DISPLAYS AND RWY LIGHTS. AS WE TURNED OFF WE SLOWED AND TOOK A HARD LOOK AT THE CTRLINE LIGHTS; AT WHICH TIME I SAW A VERY DIM GLOW MUCH LOWER THAN A NORMAL STEP #1 SETTING IT SEEMED. GND TOLD US TO TAXI TO THE RAMP BY ANY RTE WE WISHED; JUST SO LONG AS WE DIDN'T GO BACK OUT ON THE ACTIVE RWY 35L. TAXI TO RAMP WAS UNEVENTFUL.