I would use LED's illuminating some fiber optics.
Build a 'light engine' that easily fits in the fuselage of the model, with tiny optical fibers running to where you want light.
Makes building the thing less of a technical nightmare.

 

I would use LED's illuminating some fiber optics.
Build a 'light engine' that easily fits in the fuselage of the model, with tiny optical fibers running to where you want light.
Makes building the thing less of a technical nightmare.

There you go! Good idea for those who may follow.