Heat ray lighting. I would like to say that the easiest way to do this is just hot glue some LED strip to the back of the plastic flame and just tap into a flasher.
The way I did it was to use this optocoupler so the shaker motor could be used as a trigger. That requires a separate power supply for the LEDS. The optocoupler is labeled so you have voltage input output to the LEDS and the trigger.
I should have taken some pictures as l was doing this but I didn't.
The LED strip that I used you can cut to size and I also cut some of the sides off so it would stay hidden. Be careful if you do this don't get to close to the LED as it will stop working. There is plenty of strip to play with. There is a switch right by the back of the bridge to bring the wire down to the bottom of the playfield. The wire is at the bottom of the flame.
NOYITO Optocoupler isolation MOS FET 10A DC 2.7-27V High-Power Field Effect Tube Driver Module 0-20Khz PWM Switch Control Board Development Board Module amazon.com link »
Ocona COB LED Light Strips ,... amazon.com link »