For Briefing room and Detention Block I use multiple leds with a 12V power supply.
Same thing for light tubes on Falcon Bay.
For background of Hallway, a simple 40w bubble on back and 2 leds.
I have add an neon tube on Lambda Shuttle level.
Link to bigger picture of the attachement :
Click here.
As you can see, I've added Tie Bomber above the shutlle. Picture take without any other lightning than dioramas's lights, no flash used.