A map with lighthouses was produced [1] that gained popularity because it was nicely rendered, but it showed how flawed OSM data was in this regard. Very often little beacons [2] are mapped as man_made=lighthouse, which is not right. Lighthouses are big structures that were built to have living quarters for people that operated them.
So a fuzzy rule can be created, you can't have a man_made=lighthouse tag and seamark:xxx=yyy tags on the same object. That's instantly an error. Seamark tags are used for instruments that help navigation, and lighthouses are structures that can house those instruments. But they are not the same thing. So a lighthouse can be an area with a seamark node at the place where the light is. Is this generally accepted? Thanks, Janko [1] - https://api.mapbox.com/styles/v1/planemad/cjcdq00xd3tg82rpxkl4ojwp5.html?fresh=true&title=true&access_token=pk.eyJ1IjoicGxhbmVtYWQiLCJhIjoiemdYSVVLRSJ9.g3lbg_eN0kztmsfIPxa9MQ#1.5/30.890431/51.367743/0 [2] - https://wiki.openstreetmap.org/wiki/Seamarks/Lights
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