Parks Canada says it's not interested in running two lighthouses in Nova Scotia that have been declared surplus even though they sit on national historic sites.

The lighthouse in Louisbourg and one on Georges Island in Halifax Harbour were both among nearly 1,000 lighthouses declared surplus in May.

Larry Ostola, director general of historic sites for Parks Canada, said the agency already manages 14 lighthouses across Canada, including five that are designated national historic sites.