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         Lighthouse: high tower topped with 
          a beacon light to guide ships at night. 
          Solar valve: system of regulation that captures the rays of the 
          sun. 
          Lantern pane: glass panel. 
          Service room: room used for the upkeep of the light. 
          Bedroom: room used for resting or sleeping. 
          Control room: room used to operate the light. 
          Living quarters: room where the lighthouse keeper lives. 
          Gallery: viewing platform. 
          Cupola: domed roof. 
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