The Lighting is still in the process.  I used a bit of a warmer color this time, but there is definitely still a very cool feel to the whole level.  I promise it will be much brighter.
As for the scale, it's only two floors, the first is a little more closed off, and the second is much more open.
The rest of the building is just to give you a sense like you're in an actual abandoned facility.  It modular as hell, so one side of the building is 4 sides.