From the record
“Aransas Pass Light Station also called Lydia Ann Lighthouse is an historic light station in Aransas County, Harbor Island, just outside the city limits of Port Aransas, Texas, behind San Jose and Mustang Islands, that protects a natural gulf pass to Aransas and Corpus Christi Bays.”
Wikipedia article Aransas Pass Light Station, CC BY-SA 4.0.
One of 6 National Register listings published here for Aransas County · listed in 1977 · category: District · built in 1855.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service