Hello Kendras, i wasn't there long time and now i found this mod. I don't know in what state your work is, but if it can help you, you can use my old data for lighthouses. This data are taken from real positions of real lighthouses from whole world. After that i reduced number of lighthouses for some smaller amount (so for example i completely removed lighthouses from west coast of America, because are irelevant for atlantic war...) and fix some positions to corespond to SH map.
Here is my table:
http://www.ucw.cz/~jerome/reduced.html
You can see there real coordinates and coordinates counted to SH too.
But be careful, at the bottom of table are aded coordinates of buoys and lightboats from GWX too. They are marked in row groups as GWX_SCR.