Fortunately, most of the materials have the same shader arrangement, just different texture maps associated with them.  I just revamped the lights to Inverse Square and changed one to high-intensity area light.  I'm trying to keep it close to physically realistic without making it photorealistic if you know what I mean.  I am noticing that the overhead mesh lights are causing a bit of firefly background because I ramped the intensity a little higher than illustrated above.  I also made some material changes but those are easy to manipulate.