Upper Michigan has some definite breaks with population density. Escanaba has nothing, while Mackinac Island is very bright. Closer to home, there are hotspots

Upper Michigan has some definite breaks with population density. Escanaba has nothing, while Mackinac Island is very bright. Closer to home, there are hotspots at Houghton/Hancock and Copper Harbor, but emptiness in between, whereas Calumet/Laurium is quite a bit more populous than anywhere farther up the peninsula.