Having helped to light actual TOS
-era sets, I can tell you, Donny, that one of the things that's missing that will make the sets pop is using a cucoloris in your lighting. Instead of smooth, bland (albeit colorful) walls, I think you need some "texture" to make the rooms look like something is going on there, instead of just looking dead:
I agree that my sets could use this. I just have to find a way to do it with the gaming engine. The obvious way would be to actually make a 3d "cookie" mesh with a spotlight entity behind it. The problem, however, would be that this "cookie" would be visible somewhere in the set.
However, UDK may have a way to add a texture mask to the light entities themselves. I'll have to do some research and fiddle around with it a bit. I'll be sure to post any results here.
Thanks, Greg. Your help has been invaluable!