Michigan Lighthouse and Maritime Heritage Act - Directs the Secretary of the Interior, acting through the National Park Service Midwest Regional Office, to study and report on Michigan maritime heritage resource preservation and interpretation, including: (1) potential economic and tourism benefits of preservation of these resources; (2) suitable and feasible options for long-term protection of these resources; (3) the manner in which the public can best learn about and experience these resources; and (4) ways of linking national, State, and regional and local areas and sites into a Michigan Maritime Heritage Destination Network.