This is the initial lighting test using lights in Unity and keeping them set to Forced Vertex. It looks okay and the performance is good, except that after adding a few lights, they begin to cut out because all the geometry is being combined. After trying a few variations of layouts and light settings, I realize this is probably not going to work.
Here is the level combined and vertex welded in 3dsmax, and then vertex lit which, which not only processes way faster in max, but it also runs in the game without any lighting calculations so there are way less draw calls becuase there are no lights in the scene. The only down side is that the level isn't as easily modified after it is merged together, but by this point the level design should already be signed off on.