AN ACR LGT LANDED WHEN THE RWY LIGHTS WERE OUT AND THE ILS WAS INTERMITTENT.

Narrative

AT A POINT APPROX 5 MI OUTSIDE THE MARKER FOR RWY 4R BOS; WE WERE ESTABLISHED ON THE LOC DSNDING TO MARKER ALT. THE ILS GND EQUIP FAILED AT THIS TIME AND WE WERE CLRED FOR THE RWY 4R NDB APCH. WE CONFIGURED THE AIRPLANE IN PREPARATION FOR THE NDB APCH. THE ILS CAME BACK ON LINE AND WE WERE RECLRED FOR THE ILS RWY 4R. WE WERE BACK AND FORTH FROM ILS TO FMS TO NDB TO FMS TO ILS NAV WHILE IDENTING RADIOS AND RUNNING THE FINAL CHKLIST. WE BROKE OUT BELOW THE CLOUDS AND HAD THE ARPT VISUALLY. NEXT THE TWR ANNOUNCED THAT THEY HAD LOST 'ALL' ARPT LIGHTS. MY FO ADVISED THEM THAT WE HAD BOTH THE THRESHOLD AND APCH LIGHTS IN SIGHT. TWR ASKED MY INTENTIONS AND I REPLIED THAT I DID NOT KNOW THE LEGALITY; BUT WOULD CONTINUE. WE PREPARED FOR A MISSED APCH; BUT; AS MORE LIGHT REFLECTORS AND THE RCLM BECAME CLRLY VISIBLE; I CONCLUDED THAT THE SAFEST AND MOST PRUDENT ACTION WOULD BE TO LAND FROM THIS STABILIZED POS RATHER THAN TO PERFORM A GAR INTO AN ATC ENVIRONMENT THAT HAD JUST EXPERIENCED MULTIPLE FAILURES IN THE LAST 3 OR 4 MINS. WE LANDED UNEVENTFULLY WITH INOP HIGH INTENSITY RWY LIGHTS; TOUCHDOWN ZONE; AND CTRLINE LIGHTS. ALSAF II THRESHOLD AND ARPT SIGNS WERE OPERATIONAL. MANY REFLECTORS WERE VISIBLE. SUPPLEMENTAL INFO FROM ACN 257430: THE ACFT LIGHTS PROVIDED SUFFICIENT ILLUMINATION OF THE LNDG AREA STRIPES; RCLM'S; RWY EDGE AND REFLECTORS ALONG THE RWY EDGE (SNOW STAKES) FOR A COMFORTABLE LNDG AND ROLLOUT. OUR OPS SPECS REQUIRE RWY EDGE LIGHTS AND THRESHOLD LIGHTS FOR LNDG AT NIGHT.