Quoted from CaptainNeo:LED's did suck. They seemed to fix the "strobing effect" now so they arn't as bad as they used to be. They are brighter as well. But they still need to find a way to have the super brights. Disperse the light out sideways more rather than up. I like LED's in some spots in some games. But not every game everywhere.
I will admit they seem to be getting better. I will also admit I am trying to keep an open mind. But even aside from the strobing (which in my opinion pretty much renders the game unplayable), I see a lot of unnaturalness to the light from these LEDs. Weird reflections off the ball as it is traveling around, other strangeness. For all their disadvantages the ancient incandescent light bulb is pretty perfected in light dispersal. Or maybe we are just more used to it?
And you mention them being brighter as an advantage. I think that is where we part ways. To me that is the real problem with LEDs, they are in a lot of cases just too bright, especially in GI and flashers. We shouldn't have to wear protective sunglasses to play a game of pinball. IMHO.