How to operate a carbon arc lamp. 7:06 video.
https://www.youtube.com/watch?v=9d7bsCiRFLE
Previously:
https://www.homemadetools.net/forum/...741#post163461
https://www.homemadetools.net/forum/...295#post131030
https://www.homemadetools.net/forum/...931#post171597
https://www.homemadetools.net/forum/...730#post163389
https://www.homemadetools.net/forum/...896#post133574
