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The daily operations of the Jupiter Lighthouse relied on a trio of keepers, including a primary keeper and two assistants. Their responsibilities encompassed maintenance and ensuring that the light remained functional throughout the day and night. Unlike modern electric systems, the lighthouse originally operated on whale oil or lard oil, necessitating the labor-intensive task of carrying fuel up its 105 spiraling stairs. This demanding work led to the establishment of shifts, enabling the keepers to maintain round-the-clock vigilance.