Anatomy of a Lighthouse: Information on materials, lantern room and optics, with cut-away diagram of lighthouse side view.
Dan's Lighthouse Page: Former member of U.S. Coast Guard provides lighthouse history, the basics on aids to navigation, and other subjects.
Historic Lighthouse Preservation Handbook: Published by the US Government as a practical aid to maintenance of historic lighthouses. Explains the materials and construction techniques used in different types of lighthouse.
Leading Lights: Contains news, information and an online book store dedicated to lighthouses, light vessels and general maritime topics.
Lighthouse Design and Equipment: Covering topics such as early construction materials and sources of illumination, lightship design, typical styles, and the Fresnel lens.
Lighthouse Digest: Electronic version of the international lighthouse magazine. Includes photographs, features, news, tours, cruises and the Doomsday List of endangered lighthouses. Archive of past issues.
Lighthouse Explorer Database: Information on more than 1,500 lighthouses around the world.
Lighthouse Getaway: Atmospheric photographs of lighthouses in North America and Ireland, organised by area, with history and description, from William A. Britten.
Lighthouses of South Africa: Tour of lighthouses from Cape Columbine to Danger Point, including Robben Island.
Lighthouses: A Photographic Journey: Extensive amount of information and photographs of lighthouses from around the world.
Lighthousing.net: Discussion forum for lighthouse enthusiasts also offers news, stories, photo gallery, tour information and book reviews. [Registration required for some sections.]
Pacific Rim Light Stations: Vintage photos of the Howland Island Light, provided by the U.S. Coast Guard.
Sea the Lights: Robert de Via gives lighthouse facts and trivia, a glossary of terms, some photographs and links to related sites.
The Science and Mathematics of Lighthouses: Educational resource, with information on the history, geometry in design, physics of the beacon and chemistry of the fuel of lighthouses.
The World Lighthouse Society: Newsletter, publications and information on the executive board, subscriptions and membership.
World Lighthouse Encyclopedia: Comprehensive listings from 84 countries.