the image itself is actually pretty dark, its just using the light in the helmet (not sure if it was a light emitter or a parented poser light in that image) and a starfield image on BB environment sphere for light.  

I just grabbed images that I had in the render history, and most of them were from messing around with the light emitter or point light embedded in the light housing of the helmet.

I'll do up a 'normal' light level render later on today.