Personally, I would leave the standard bulbs, just so i could see n play the machine the way it was designed to first be seen as it came off the production line (lighting wise).
Also, if u do decide to do the full LED treatment, contact Andrew (Beaky) member here who has the special roms avail that will take care of the LED ghosting. Andrew tested the anti LED ghosting roms in both my fishtales and in my Star Trek Next Gen and it makes a big difference.
I dont have LEDs in either, but for testing purposes we added some LEDS to check the effectiveness of the anti ghosting rom and there was a very big difference.
I wouldnt LED a fishtales without the update rom which will cost you next to nothing.
cheers. Brett