I am in the process of re-building a layout to replace the one I lost when my house burned down.  I wanted to have a shadowbox effect to an around the walls layout with a center peninsula sticking out.  We used CFL 6,000K bulbs in conjunction with Halogen under counter lights for warmth.  They Halogens dim for dusk to dark effect.  We noticed a problem when we were partway done around the peninsula that I have read others having-you could see the lights inside the valance on the peninsula when standing along it's edge.  The valance couldn't come down any further as it would block the scene and make working on the layout very uncomfortable.  We came up with the idea for baffles painted flat black as a block for seeing the lights.  It seems to work very well except for short people.  I guess I'll get them a box to stand on!!  Pictures are attached which should be self explanatory.  When I get some time, I will start a blog about the layout and it's progress.

Peter

Here's a few shots of the portability of the modules.

Moderator edit: changed the images from attachment to inline.