I'm fascinated by lighthouses. This is really the only reason I watched this. People CAN go insane in isolation situations like this. But not these two salty 1800s characters and not after only 4 or 5 weeks in a relatively well-stocked and roomy abode. Unless there is a supernatural entity, which is hinted at several times in this movie -- the mermaid fantasy, the seagulls, the light itself. But it's never resolved. Basic "these guys are just insane" is what we're left with for the duration. They don't even go insane. They just are kind of insane from the start. And drink and yell a lot. And after two hours plus of just grossness of that theme... we find out that seagulls hate insane gross salty sailor guys. Yay!