I saw part of this movie probably 20+ years ago. I remember that it was in black and white and took place on a small island with a lighthouse. There was a couple that I believe were the lighthouse keepers. It featured a large UFO object that was harassing the couple. I seem to remember that the object wasn't consistent from scene to scene and that the movie was kind of surrealistic maybe, like 2001. I think the object pulses or grows/glows at one point and the wife is cooked/burnt.