What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
While operating on an IFR clearance, pilot clearly identified the airport from several miles away, reported the airport in sight and cancelled IFR. Pilot perceived the visibility to be very good, which he attributed to a full moon and with what he perceived to be high clouds, (however the ATIS information at the time was that the sky was clear with 10 mi visibility and moon rise was approximately 27 minutes prior to touchdown). Pilot attempted to turn on airport lights during his approach to landing but was unable to do so for unknown reasons. Due to what he perceived to be good illumination he elected to land without lighting. On short final pilot lost visual references due to darkness but did not believe successful go-around was possible and elected to continue the landing. Ground tracks indicate that touchdown point and roll-out were off runway surface in grass between runway and taxiway.
As the FAA filed it
WHILE OPERATING ON AN IFR CLEARANCE, PILOT CLEARLY IDENTIFIED THE AIRPORT FROM SEVERAL MILES AWAY, REPORTED THE AIRPORT IN SIGHT AND CANCELLED IFR. PILOT PERCEIVED THE VISIBILITY TO BE VERY GOOD, WHICH HE ATTRIBUTED TO A FULL MOON AND WITH WHAT HE PERCEIVED TO BE HIGH CLOUDS, (HOWEVER THE ATIS INFORMATION AT THE TIME WAS THAT THE SKY WAS CLEAR WITH 10 MI VISIBILITY AND MOON RISE WAS APPROXIMATELY 27 MINUTES PRIOR TO TOUCHDOWN). PILOT ATTEMPTED TO TURN ON AIRPORT LIGHTS DURING HIS APPROACH TO LANDING BUT WAS UNABLE TO DO SO FOR UNKNOWN REASONS. DUE TO WHAT HE PERCEIVED TO BE GOOD ILLUMINATION HE ELECTED TO LAND WITHOUT LIGHTING. ON SHORT FINAL PILOT LOST VISUAL REFERENCES DUE TO DARKNESS BUT DID NOT BELIEVE SUCCESSFUL GO-AROUND WAS POSSIBLE AND ELECTED TO CONTINUE THE LANDING. GROUND TRACKS INDICATE THAT TOUCHDOWN POINT AND ROLL-OUT WERE OFF RUNWAY SURFACE IN GRASS BETWEEN RUNWAY AND TAXIWAY.