I've used an alternate technique to simulate lighting in starships without actually running wires: Silver reflective tape. Cut into small squares for each window- it gives a decent effect. Of course, you cant beat good old LED's... I'd beware of spraypainting the inside black or silver without first sealing it with a colorless primer- bleedthrough can be a real pain. Generally I'll hit it with a few coats of clear sealant first, then the color mask.