As I understand it (and I'll admit I could be mistaken) Round2 themselves will be selling the lighting kit. I signed up for the special "newsletter" (getting a free T-shirt in the deal) and some of the "behind the scenes" shots demonstrated how the LEDs would fit into the "side" of clear plastic pieces that in turn pop into a section of portholes. the whole grouping is illuminated through a "light-bar" effect.
Not too much was shown about the nacelle domes. At the time of that particular newsletter, the design team had not yet decided upon traditional "bell" shaped LEDs or rectangular LEDs with a beveled face.
One major caveat. The designers have opted to have a recessed "deflector" grid upon the saucer (similar in concept of the TMP version). Yes, it resulted in an uproar from some quarters, with fans reminding Round2 Matt Jefferies "penciled in" a grid only at the insistence of Roddenberry, lines so faint they wouldn't register on camera. Round2 claims the grid will assist with the alignment of of the decals and it will be easier for builders who don't want them to fill them than it will be manually scribe them if they were not present and desired. Round2 claims they will be very, very thin and shallow, minute enough that a reasonable coat of paint will fill them.
Will shall see.
Sincerely,
Bill