We have a few of the classic swedish electric candleholder made in wooed, the stairs type, with 7 lights in it.
I will modify it with WS2812B LED’s (individually addressable), and WLED as the controller.
The candle holder with the small WS2812B on indidivual pcb’s.
Unscrew the feet, and remove the thin plate covering the inside
All the old 220V wires cut, and ready for further cleaning up
Bending one of the copperplates so I can grab it with a thin set of pliers
The pliers in action
The inside of the ‘candle’ pulled out.
7 LED’s and 14 wires (the only ones I had that were thin enough was black and red)
5v and gnd wired in, that will go to a ‘power bus’ in the base, and then the in and out datachannel set up, the red is in, and the black is out.
Then the signal wire is marked with a silverpen, to make sure they are not confused.
The LED is mounted in the inside holder, fits perfectly
The signal wires are put aside for later, so the power bus can be created.
The powerbus is created, the connection is in parallel, and the signal channel is connected, with red as input, and then the black out, connected to the next led’s red input.
The LED’s mounted inside the candles
The cable restraint is mounted again.
The candle assembled, and everything is working.
Now for the final touch, the bulbs glas has to be seperated from the metal.
7 pieces of glas, most of them went well, two got minor breaks, but that will not be visible when they are mounted
The final result
And then the ESP32 mounted on a Dig Uno board from quinled.info
I have three of these, and two of them are now converted, it takes quite a few hours, so the last of them is for next session 
I had a broken cable, and when I fixed that I made a short on the signal 
