The buildings have been removed by the Coast Guard. This light is considered to be one of the best, both in terms of construction and in regard to the visibility of its light. You can rent a moped in Nantucket center and motor to the light inside about 20 minutes. Unfortunately, the bike path that runs along side the main road is closed to mopeds. On the ride over to the light, it often feels like you're are an inch away from being road kill.
Caution is advised.