Complex sentence: Lynde Point Lighthouse used whale oil until 1879 when it switched to kerosene, it was electrified in 1955 and fully automated by the United States Coast Guard in 1978.
Split into simpler sentences: Lynde Point Lighthouse used whale oil until 1879 when it switched to kerosene. It was electrified in 1955 and fully automated by the United States Coast Guard in 1978.