When owners purchase led kits and change out their 1977-1995 pinball machine incandescent light bulbs to bright colorful leds (usually attempting to match artwork color and playfield insert colors) the result is a similar game to game Neon blue and purplish glow that can be seen on any game title usually altering the original illumination the factory intended when screening the artwork so its filtered for incandescent bulbs only.
Hey Tim did you see those weird glowing pinball machines on Ebay?
Yeah! they are expensive and have Led syndrome!