 "Stag light" was an unofficial term given to some isolated lighthouses in the United States Lighthouse Service.It meant stations that were operated solely by men, rather than accommodating keepers and their families.Electrification and other technological advancements such as remote monitoring and automatic bulb changing began to appear in the 1960s and over the course of the late 20th century made paid resident keepers at the lights unnecessary in certain areas, while simply altering their responsibilities elsewhere.