Today I take a blue Led 5mm with 39Ohm Resistor and connected it parallel to the Merlin Magic Lamp.
It is flickering to much, so I will add a Capacity to reduce it.
First I use some head shrink tube to reduce the angel of radiation and connect it to the merlin magic lamp (here you have to check the polarity).
way of the wire…
I am using double sided adhesive for position the led
Soldering: