Lighthouse keepers have long been a favorite of mine. For one reason, I grew up on Martha's Vineyard and we enjoyed five lighthouses on the Vineyard. Another reason, is that they were the only job paid by the government that gave equal pay for women, long before women's rights became a political issue.
In Houghtalings Handbook ©1887 there are several pages of the salaries for lighthouse keepers, starting on page 188 to page 197. There were thirteen districts. I'm going to post a couple examples for you.
Saint Croix River, Me. $460
Mount Desert, Me. $820, $480, $440 (Must have had more than one keeper.)
Alligator Reef, FL. $820, $465, $455
Cat Island, Miss. $625
Grand Point, Mich. $400
Gull Rock, Mich. $640
Cape Blanco, Ore $800, $600, $550
St. Helen's Bar range Ore. $240