Below is a link to a YouTube video of one of the oldest surviving operational carbon arc lamps. This lamp is very typical of the first generation of lamps used for overhead street and industrial lighting in the 1880's. The primary use of many early smaller marked power glass pieces by T-H, Ft.W.E. Co, The BELCo spools etc was to insulate arc lamp circuits that used these lamps in the late 1880's. Lamps of this design had became totally obsolete by the year 1900. Few people have ever seen one of these first generation 1880's arc lamps in operation so I made a video demonstrating the operation of the lamp and the replacing of the carbon rods. Restoring his lamp and recreating all of it's missing parts was a total labor of love that took dozens of hours of careful work.

https://www.youtube.com/watch?v=bq-KSK2fVbU&list=PLBYE3OecpPl8-QNt1Gj-XMeehzvCBcw64