The Halfmoon Reef Light (also Half Moon Reef Light) is one of the many screw-pile type lighthouses built on the Texas Gulf Coast, but the only one that still stands. To distinguish it from the nearby Matagorda Island Light it was given a red glass chimney to be used with the oil lantern to give it its red beam. Though originally constructed on the bay, the current resting place for the light is on Port Lavaca, alongside Highway 35.