Most of the lighthouse records are in the downtown D.C. National Archives with photos and drawings at the College Park, Maryland, facility. This is a useful article for planning your research trip. The Society has more tips on their website at http://uslhs.org/resources/finding_information/libraries_archives/national-archives
Candace was the US Lighthouse Society historian from 2016 until she passed away in August 2018. For 30 years, her work involved lighthouse history. She worked with the National Park Service and the Council of American Maritime Museums. She was a noted author and was considered the most knowledgable person on lighthouse information at the National Archives. Books by Candace Clifford include: Women who Kept the Lights: a History of Thirty-eight Female Lighthouse Keepers , Mind the Light Katie, and Maine Lighthouses, Documentation of their Past.