A lighthouse keeper or lightkeeper is a person responsible for tending and caring for a lighthouse, particularly the light and lens in the days when oil lamps and clockwork mechanisms were used. Lighthouse keepers were sometimes referred to as "wickies" because of their job trimming the wicks.

What does being a lighthouse keeper mean?

: one who maintains a lighthouse and operates the light and fog signals.

Is light keeper one word?

a person appointed to take care of a lighthouse or light-ship.