I modified an old oil lamp to house a Nixie tube to simulate a flame.
The Nixie tube only has plus and minus symbols to display and was made to flicker using a Picaxe MCU.
Youtube video of the "flickering" Nixie tube here.


Picaxe and high voltage module are placed inside lamp.
The 2-watt resistor and zener were added later and are not in photo.



Back of hand-wired board using teflon tubing and bare-tinned wired.