Yeah mine is with a Gotlieb Victory which is a system 80b and I just have the white LED's as well but with the board. I think why it might happen on some machines and not others has to due with how many hertz (I think that is the right word) are supplied to the AC circuit that powers the GI. As I understand it any light that runs on AC unless rectified turns on and off at the same rate that the ac is modulated at (Again I think that is the right word). So I wonder if for my Victory the 6.3 VAC is going at like idk 45 hz or something right on the edge of where peoples eyes can pick it up and perhaps your game runs the 6.3 VAC GI circuit at like 60 hz or something where our eyes simply cannot pick up flicker/ strobe.
Quoted from Scorch:
I actually tried with the board first (with some different RGB LED's), and it was pulling too much current so the lights were switching on and off, so needed to get a second board (one for each row)... But before I tried that, I took the soft white LED's which were lower current, and ran them instead without the board, and it looked great.
I don't know if it makes a difference but my machine is a re-import so maybe there is something slightly different with the power supply? I'm planning on trying this on my newly acquired SST so will see if I have the strobing there.