In observance of Martin Luther King Jr. Day, all Lighthouse branches and offices will be closed on Monday, January 19, 2026.

A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lenses and to serve as a beacon for navigational aid for maritime pilots at …

Lighthouse has audits for performance, accessibility, progressive web apps, SEO, and more. You can run Lighthouse against any web page, public or requiring authentication. You can run …

Dec 24, 2025 · This site includes photographs, directions, histories, and GPS coordinates garnered while personally visiting every lighthouse in the United States and nearly every …

Dec 19, 2025 · The United States Lighthouse Society is a nonprofit historical and educational organization dedicated to saving and sharing the rich maritime legacy of American lighthouses …

Lighthouse, structure, usually with a tower, built onshore or on the seabed to serve as an aid to maritime coastal navigation, warning mariners of hazards, establishing their position, and …

Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps. When auditing a page, Lighthouse runs a barrage of tests …