From what I can see, that light is not manned, it's some sort of automatic acetylene thing, or was at the time of the article I read. That house is not habitable, there is no slate on the roof on the other side. No sign of fuel tanks there.
If this is a misprogramming of the FMS waypoint for Blacksod, with the waypoint named Blacksod, but carrying coordinates of Blackrock, it may have been there for some time. This machine may never have gone to Blacksod before that night and the error wouldn't have been noticed.
The story of two missed approaches at Blacksod doesn't stand up. A poster above has a good insight when he/she says that they may have tried for the visual westbound, missed and came back the other way.