 Guests are expected to help show the Light, and to perform lightkeeping chores, as a condition of their occupancy.The DeTour Reef Light's former 3½-order Fresnel lens, taken out of service in 1978, is displayed at the DeTour Passage Historical Museum in DeTour, Mich. and the lighthouse's former diaphone foghorn has been returned to the custody of the DeTour Reef Light Preservation Society.It is temporarily displayed at the Drummond Island Historical Museum.