Historical and Architectural information on lighthouses are obtained from several sources including, but not limited to, Wikipedia.com*, the actual lighthouse’s home page (if available), Lighthousefriends.com, travel sites, and Youtube.com.
Images are obtained from photos I have taken personally, Google searches where images are listed under “Free images” as in pixaby.com and pexels.com Pixaby is a vibrant community of creatives, sharing copyright-free images and videos. All contents are released under Creative Commons CC0. Pexels provides high quality and completely free stock photos licensed under the Pexels license. All photos are nicely tagged, searchable and also easy tofind through their discover pages.