There's nothing unusual about using a different Lighthouse in a movie or television - even when there are plenty of real ones.
In the show Providence they had a storyline about a Lighthouse and the person living at it and with all the real Lighthouses in RI they used Pigeon Point with a fake name.
Similar situation in the movie Snow Falling On Cedars- it takes place on an island in Washington State and uses Portland Head as the Lighthouse that is intregal to the storyline.
Happens all the time.
Dennis