From the Lantern, the Fastnet Lighthouse, Co. CorkEighty nine steps up a granite tower twelve miles out in the Atlantic, and then you walk into this. The Fresnel lens fills the lantern room at Fastnet like something from another century, because it is. Most Irish lighthouses have been converted to solar by now, their old optics removed. But solar panels wouldn't last a month out here. The ocean would tear them apart. So the Fastnet keeps its original giant lens, every prism and ring of hand ground