I've done a little more work on the shaders and the lighting. The glow effect was interesting - I tried to map a ramp to a sampler and use that for my glow intensity similarily to the way I did the incandescence but it just seemed to give me an intensity of 1. I used the glow shader node that's in the hypershade by default then to control the intensity and that seemed to work.

c & c on lighting and shaders greatly appreciated