[2][3][4] In 1933, more than 30,000 tons of rocks from the excavation of Radio City Music Hall were added to the riprap foundation.

The acquisition was made through a founding donation by The Pettee Family and restoration began in June 2018 to address the critical structural deficiencies of the lighthouse.

In 1899, the United States Congress appropriated $60,000 for the establishment of a light and fog signal at Greens Ledge.

The foundation form is made of identical curved-iron plates with top inward-pointing flanges that are bolted together and secured with knees.

The interior is lined with brick to insulate and strengthen the tower and to "provid[e] an anchorage for the winding cast-iron stairs which rise on the periphery of each story," writes historian Dorothy Templeton.

[6] The plain prefabricated features underwent a period of development of which the Greens Ledge Light was part of a second phase.

Templeton describes, "the brackets which support the watchroom gallery and covered deck [as having] a simplified classical detailing and [the] rectilinear window sashes are enclosed in shallower, plainer cast-iron surrounds.

The cast-iron door to the lighthouse faces south and at the time of nomination the windows were sealed with plywood.

"[6] The lighthouse served as a source of inspiration for Walter DuBois Richards, an artist, for over forty years.