I did a 16x13 room with blacklight carpet, back when I had 24 video games in it (0 pins). Even with videogames, with the 15watt marquee lights could cause a bit of a wash out, plus, with screens covered only in glass instead of tinted plexiglass, the UV actually illuminated the monitors which is a huge distraction. Then when I started bringing in pins I found the UV is quite distracting, especially if mylar is on the playfield, it causes it to glow a ghost-white, dulling the colors much like the video game monitors. Also, it changes the colors of other things, though does make yellow and white bats glow very nicely. Overall however, they are a distraction from the game.

As far as LED's go, honestly if you think they are whitening the room you went with too bright of LED's (IMHO). In my Bally Vector, I actually found that the #555's behind translucent inserts were brighter than the entry level Ablaze/PBL or Comet LEDs by quite a bit. However those LEDs worked great behind the blue/green translucent or red/yellow opaque inserts bringing out the true color without being too bright (brighter than a 555 incandescent behind a blue but only because the blue was now the correct color, but still dimmer than the translucent amber lit by a 555 incandescent)

I'm in the camp of as close to original as possible/intended with brightness/color temp, so rarely do I use anything but the entry level LED's.

If you want to maintain the brightness level but also get the carpet to really glow, you need some blacklight canon's to spot hit just the carpet, and mount them under the games so they aren't directly visible. The normal ways just throw the light everywhere and can be distracting to those with sensitive eyes or glasses that do some weird refraction of the light.