X-raying the tiny AC LED lamp filaments

I wondered how these LED filaments were configured inside, so I decided to explore one - using the splendid lamp X-ray device that AvE sent me.

The internal construction of the filament is odd and not quite what I expected.

The circuit is effectively 42 LEDs in series with a resistor in the base of the lamp. The filament can operate on either polarity due to the unusual rectifying system used.

Note that I inadvertently got the LED rectifier diodes wrong at one end. It was very late when I made the video. Originally I wanted to draw out the schematic, but ran out of time.

Here's a link to the video where AvE made the copper X-ray unit:-
https://www.youtube.com/watch?v=ivrxXEUWHL8

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