Here's what I used for ligting the Enterprise NCC-1701-A model:
-six white 4-inch 12V cold cathodes,
The cold cathodes (miniature 12v flourescent tubes) for the Enterprise NCC-1701-A model.
I originally planned on putting 8 four-inch tubes into the saucer section,
but ended using 4 six-inch cold cathodes for the saucer section,
two six-inch cold cathodes for the secondary hull
and 2 twelve-inch cold cathodes for the engines.
The whole model runs on 12 volts because that is what cold cathodes run on.
I used one resitors for each LED to get the correct voltage for the LEDs.
On 8 and 10 o'clock, you can see the drivers for the four cold cathodes in the saucer section.
I used two red LEDs for the red lights above the shuttle bay, and two yellow LEDs for the positioning lights on the sides of the rear ends of the engine narcelles.
I did not put any white LEDs into the spotlights at the front of the engine narcelles. The light you see in the pictures of the finished model is from the white cold cathodes inside the engines.
The yellow masking tape you see in the picture above, is stuck on the magnets that hold the two saucer sections together.
The tape is only temporary to weaken the magnets and making it easier to pull the saucer apart.
I decided to not glue the saucer section shut so I will still be able to replace broken LEDs or cold cathodes.
The two cold cathodes inside the belly of the ship right above the botanical garden.
Again, I used one driver for two cold cathodes. The driver is under the botanical garden section on the right, right behind the "tz" in Ketzer.com
The longer (12-inch) cold cathodes in the warp drives, by the way, are each powered by one driver placed into the rear ends of the warp narcelles.
90% of the cables inside the ship are hidden behind aluminum foil.
At the top of the aluminum tube, you can see the main power line supplying the 12 volts for the ship.
If you are building the same (or a similar kit) make sure to either paint the model black and then white from the inside or to add tin foil on the inside to keep light from shining thru the material that in certain areas is very thin and translucent.