A stunt is possibly being pulled.
It's not obvious to me that the Hammond transformer in the foreground is
connected to anything.
Generally, on those larger glass tubes, getting a nice blue gas glow
requires the filament be lit. In such a large tube, the lit filament
would be nearly as bright as an incandescent bulb...because it is an
I suspect the glue "glow" is coming from reflections of various blue
LEDs behind the glass bulb or reflecting off it.
Quite possibly a poster looking to see how many people he can fool.
Possibly the same chap who advertised a collection of "known good" old
radio and TV tubes that he just finished cleaning, by removing the glass
tops, cleaning the insides, and re-assembling.
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