Quote - Maybe I'm wrong, but I dont think that is true..

My understanding is that the box is poorly named, and doing so removes the object from any IDL calculations.  Having the box checked does not cause the object to emit light.

I think you are correct, at least from what I have been doing so far with IDL.  An object will only emit light using it's ambient color/value.  Checking or unchecking this box only seemed to exclude or include it from  the calculations.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.