It’d be hard to find a better introduction to Flickr’s Michigan Lighthouse Group than this photo by Oldhamer of the South Haven Lighthouse taken in December of 2005. He notes that the top walkway allows keepers to get to the light when the bottom is covered with ice.
Be sure to click the photo to get to Flickr, then click the “ALL SIZES” link above the photo to see the detail on the ice on the light. While you’re at it, check out some of Oldhamer’s other pics. The detail shots he has are very nice.
If you get the urge to visit South Haven, be sure to check out the Michigan Maritime Museum.