I tend to convert my games to LED as a reward for finishing the restoration.
However- I think there are two or three ways to convert games to LED - one of which is perilous-
Color temp is so huge that it literally is everything in an LED conversion-
You HAVE to test- and test- and play to get it right.
People who simply order 150 LED's of X color are almost destined to end up not enjoying the game.
I spend literally HOURS going through the game and making a list of every single bulb and the color of the insert it lights, the color of the plastic it lights, its location and visibility to the player etc etc etc. And I order probably minimally 12 different types of LED for every game I do.
I have ended up really, really loving my games after LED. I have made mistakes, and ended up having to reorder significant quantities of LEDs to fix color temp/brightness etc.
You got to play, be willing to spend more after you thought you were done, and be willing to try three or four different things to get it really looking sweet.
That said- I have only done LED conversions on 2 EM games and one very early Bally SS game, so I have faced none of the problems modern games have with the fading and LED flicker/strobe/whatever you want to call it. I am sensitive to that, and it would be a problem for me.
To me one MAJOR defect in LED's currently-
NO ONE makes a LED that flashes and ends up looking ANYTHING AT ALL like a flashing incandescent bulb. The LEDs in my mind flash TOO SLOWLY and FAR too often at a metronomic cadence which results in it appearing far from random and generally crappy- I hate this, I have tried 3 suppliers and I think they all get their flashers from the same vendor cause they are all the same. If someone would provide a random flashing LED that would help a TON.
Else- I might add one thing. I just did a game and used the comet pinball Optimus Maximus bulbs for GI and a number of other places. I thought I liked my old LED GI bulbs, I now want to go back and redo the GI in my other games with Optimus Maximus bulbs- these are game changers to me.... try them- they are available in THREE white color temps. They ROCK.