Since we moved to the beach, I now have a small space (12'x10' room) with an around-the-wall layout now under construction on Mianne benchwork. I spent quite a bit of time doing basic lighting up to and including sophisticated lighting for the room/layout before I started any sort of building. I had an advisor for the lighting ... a son-in-law who is a movie cinematographer (and a member of the ASC). He knows his lighting.
Layout is two levels ... 40" and 57" on Mianne benchwork. The layout track, accessory & are operationally intensive. Ceiling is ten feet high.
There are five groups of lights in the room:
1. Two LED, non-dimmable, shop-type lights (5000K) hanging ten inches from the ceiling that are used only for construction (used most often up to this point). Very bright - and spacing allows for great light for work....
2. A RR lantern suspended from the ceiling over the control area as well as a hidden 10' LED rope light that highlights a couple of shelves of my P/W collection. These LED lights are dimmable & 3000K. Will be generally used while operating layout.
3. Three sets of four-light track LED lights (3000K), dimmable, placed about 8 feet off the floor (ceiling is 10' high). Dimmable, of course, and to be used operating the layout. These are the primary "operating" lights.
4. One track light (three incandescent bulbs) of BLUE lights placed a couple of feet or so above the layout to provide "moonlighting" with or without the other lights. Dimmable. Seems to be most effective when on alone. These are the only incandescent lights I allow in the trainroom (unless the bulbs are on a train).
5. A number of RR signs (Lionel, etc.) that light from within. Not dimmable. Good display, but probably will be too intense while running trains. We'll see.
All or none can be on while running trains ... just depends on the situation and "mood".