This is my third and perhaps most successful attempt at source lighting. See object source lighting basics for an explanation of the technique.
Here is the Firewarrior Shas’O that I worked on this weekend.
The intent was for the central scanner to be giving off a glow of light. The green extends out from the source, reduced in intensity, the further it gets from the source. There is the faintest of glow on his helmet and shoulder pad, but most of it is on the sensor itself.