Unmanned reef lights of the Florida Keys
lighthouse in Florida, United States

The unmanned reef lights of the Florida Keys were navigational aids erected near the Florida Keys between 1921 and 1935.
Overview
The unmanned reef lights were intended to mark local hazards and did not need to be visible for as far as the reef lights that were erected near the Keys during the 19th century. By the time the lights in this list were erected, older lighthouses were being automated, and these new lights were designed to be automated from the start. The lights resembled the older reef lights in having a wrought iron skeletal pyramidal structure on a screw-pile foundation. They all originally had lanterns on their peaks, so that they looked like smaller versions of the older reef lights, but had no keeper's quarters.
The first two unmanned lights in the Florida Keys, the Molasses Reef Light and the Pacific Reef Light, were built as square pyramidal towers to the same plan in 1921. The Hen and Chickens Shoal Light was the smallest of these lights, and the only one built as a triangular pyramidal tower. It still exists, serving as a daymark. The lantern has been removed. A design for a standardized hexagonal pyramidal tower was developed in 1932 and used for the Smith Shoal and Tennessee Reef lights erected in 1933, and for the Cosgrove Shoal and Pulaski Shoal lights erected in 1935.
This brief starts where responsible research should: with the source description of “Unmanned reef lights of the Florida Keys” as lighthouse in Florida, United States. Everything that follows is an evidence route, not borrowed authority.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 15, 2025. The linked authority identifier is Q7897095. Authority coordinates are 25.017, -80.383. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1921, 1935, 1932 and 1933.
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This entry incorporates text from “Unmanned reef lights of the Florida Keys” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.