Tube: EM-11 (6U5G) Magic Eye tube (tunning tube)
EM-11 is a magic eye tube, used in old radios for tunning. See some schematics on how to use this tube, for some green, fluorescent effects!
Ultraviolet Light
Powering UV light tubes. A short comparison between UVA and UVC.
Glass and… Uranium?!
UV fluorescence of uranium doped glass marbles.