Original tungsten street light on the 16th Street Bridge in Washington, D.C., in the United States.  Installed in 1910, the lamppost was made of cast iron, and the globe of ground glass.
Allen, Walter C. (October 1910). "New Street Lighting in Washington, D.C.". The Illuminating Engineer: 401–405.
<a rel="nofollow" class="external free" href="https://books.google.com/books?id=ZSUVAQAAMAAJ&amp;dq=%22Piney%20Branch%20Bridge%22%20lights&amp;pg=PA401#v=onepage&amp;q=%22Piney%20Branch%20Bridge%22%20lights&amp;f=false">https://books.google.com/books?id=ZSUVAQAAMAAJ&amp;dq=%22Piney%20Branch%20Bridge%22%20lights&amp;pg=PA401#v=onepage&amp;q=%22Piney%20Branch%20Bridge%22%20lights&amp;f=false</a>