World Composition

Hello everyone,

I have few questions about the World Composition…

As i understood, you just create a level, activate World Composition for it and through the Levels window you add each levels right?

What i want to know is what i should put in the base World Composition level, and what to each levels?

For example:

Right now, im wondering where to put Lighting, and i believe that i should put lighting, sky to the base level, and put Landscapes, Staticmeshes, etc. to each maps. Am i right?