 The plain prefabricated features underwent a period of development of which the Greens Ledge Light was part of a second phase . <unk> describes , " the brackets which support the <unk> gallery and covered deck [ as having ] a simplified classical detailing and [ the ] rectilinear window <unk> are enclosed in shallower , <unk> cast @-@ iron surrounds . " A deck <unk> the light on above the first story , the <unk> and lantern . The original roofing and some cast @-@ iron <unk> of the decks are able to be seen atop the <unk> . The cast @-@ iron door to the lighthouse faces south and at the time of nomination the windows were sealed with <unk> . The first floor of the lighthouse serves as the kitchen . The second level has two rooms split by a partition with the smaller room being a bathroom . The third level was not divided , but did not have a description in the National Historic Register of Places survey . The fourth floor has six <unk> windows and has had much of its woodwork removed and part of the cast @-@ iron floor and brick wall are exposed . The lighthouse 's lantern measures 7 feet ( 2 @.@ 1 m ) in diameter . Once active , the Sheffield Island Light was discontinued . 
