The acting, atmosphere, scenery, and cinematography are all great, and the madness of the characters is as disturbing and memorable as anything in The Witch, which I loved. However, The Lighthouse doesn't have enough of a plot to sustain its length. 109 minutes is a very long time to sit watching two grumpy, unkempt men as they repeatedly masturbate, urinate, fart, spout nonsense, and humiliate each other. The movie would have been far more effective at about 50-60% of its length, and with fewer variations on each of the above-mentioned activities. When the viewer finds himself or herself checking the remaining run time every couple of slow, crawling minutes, something's wrong.