CLOSED RWY; UNAUTH LNDG BY ATX PLT IN A NIGHT OP.

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I WORK FOR A PART 135 ADR CARGO OP BASED AT ORL. I WAS OPERATING AN SMA IN CARGO CONFIGN UNDER PART 91 RULES (I WAS EMPTY AT THE TIME OF OCCURRENCE). I HAD FLOWN FROM ORL TO TPA TO OPF TO TPA AND BACK TO ORL AND WAS FAMILIAR WITH THE WX BTWN TPA AND ORL AND DID NOT GET AN ADDITIONAL WX BRIEF BEFORE DEP FROM TPA (TO ORL). I APCHED THE ORL ARPT AND MADE AN ANNOUNCEMENT OF TYPE; LOCATION; AND INTENTION TO LAND ON THE NORMALLY ACTIVE RWY 7. THE LIGHTS WERE ON ON THAT RWY AND THERE WAS NO VISUAL INDICATION OF A CLOSED RWY (X OVER THE NUMBERS; THE RWY LIGHTS OFF; ETC). I DID NOT LISTEN TO ATIS SINCE THE ARPT CLOSES AT NIGHT AND USUALLY DOES NOT BROADCAST ANY PERTINENT INFO. I DID NOT CALL APCH CTL SINCE THEY ARE USUALLY VERY BUSY AND THE WX WAS VERY GOOD VFR (THEY WOULD HAVE ADVISED ME OF THE RWY CLOSURE). I MADE 2 MORE BLIND ANNOUNCEMENTS OF POS AND INTENTION AND LANDED ON RWY 7. AFTER TAXI; ANOTHER INBOUND COMPANY PLT INFORMED ME OF THE SIT. I NEVER SAW ANY INDICATION OF CLOSURE (TRUCKS ON THE RWY; ETC). THE OTHER RWY; 31-13; IS VERY NOISE SENSITIVE AND NEVER USED AT NIGHT. THE CAUSE OF THIS INCIDENT WAS MY FAILURE TO LISTEN TO ATIS FOR ANY UNPUBLISHED NOTAMS. NEXT TIME I WILL REVIEW ATIS EVERY TIME. I CALLED THE TWR THE NEXT MORNING AND LEARNED THEY WERE WORKING ON THE LIGHTS. I GET MY WX RPTS FROM MY COMPANY'S DUAT SYS AND WAS NOT INFORMED OF THE CLOSURE. AFTER OCCURRENCE; I CALLED THE PIE FSS AND ASKED FOR UNPUBLISHED NOTAMS FOR ORL (AND PUBLISHED) AND SHE SAID THERE WERE NONE. I DO NOT BELIEVE I ENDANGERED ANYONE'S LIFE OR PROPERTY. I THINK THE WORK ON THE LIGHTS HAD BEEN FINISHED BY THE TIME I HAD LANDED BECAUSE I SAW NO ONE OUT THERE AND NO ONE CALLED TO COMPLAIN AND THE RWY WAS SCHEDULED TO RE-OPEN AT AM00. THE ATIS NORMALLY BROADCASTS THAT THE TWR IS CLOSED AND WILL RE-OPEN AT AM00; AND NO OTHER ARPT DATA.