Lighting From Unit

In CotN 5 I saw this done, the archer had a green glow, which (I assume) is a model theyve attached to parts of the unit which creates a light. Is this correct? And f so how would I make a yellowish red one? I have a very fiery unit and I want him to light up the area around him. Any help is appreciated.

Just dl UMSWE 4. :D It has light effects and a bunch of other stuff that would help.

Thank you, I was looking for that post but I couldnt find it, didnt think to look in modeling :P