alpha centauri UFO

Try seaching the lighting kit section on www.cultTVman.com.  They have many after market kits and someone may have produced one for your model.  Worth a try, anyhow.

I just built one; great kit!  Not sure how you would go about making the lower hull spin though. Maybe the mechanism from a music box? You'd have to wind it up but that might work.

It's actually caled lightsheet believe it or not.  Very similar to the luminescent stuff on a watch.  Apply power and it lights up, it is pricey, but you can get an experiemtners kit reasonably priced.  You get several small sheets of different coors.

I would need more info before I could help. How big is the model and what is it made out of? Plus I remember of reading about a light emitting sheet that the star wars guys use for the Millennium Falcon engines that is cut to fit. that might be a better  option