Darren Carver-Balsiger’s review published on Letterboxd:
Watching The Lighthouse a second time makes distinguishing between the dreams, the madness, and the reality a little bit easier. Though it is still mesmerisingly unclear.
There's basically three simultaneous plot strands to The Lighthouse. One is Robert Pattinson's character going mad. Another is the sea (and / or the lighthouse) possessing the leads. Finally, we have Robert Pattinson's character becoming Willem Dafoe's character. These elements intermix so well that you never really know which one is most dominant in a scene.
I really can't get over just how bizarre The Lighthouse is. It doesn't fit into any box easily. I think this is one of those very rare films that is genuinely unique.