Clearly, in some cases, their purpose is to make the light station accessible. Presumably, once you're at the station, everything that is there is accessible to you.
On April 1st, 2008. See this statement in context.
On April 1st, 2008. See this statement in context.
Director, Policy and Government Relations Branch, National Historic Sites Directorate, Parks Canada Agency
Clearly, in some cases, their purpose is to make the light station accessible. Presumably, once you're at the station, everything that is there is accessible to you.
See context to find out what was said next.