Quote - I am pretty sure this was brought up before, but I am think it was in relation to Lux "built-in" geometry.... I was searching back through the multiple threads and cannot seem to locate it.

Is there a "material setting"  that makes a "prop" light emitting? 

There is a special material 'light' which does that, I haven't used it myself yet, but I found this on the wiki page on materials, http://www.luxrender.net/wiki/index.php?title=LuxRender_Materials#Special_materials_.28not_mixable.29

I'm pretty sure it was BagginsBill who did a few tests with it and posted some renders demonstrating the effect.

Software: OS X 10.8 - Poser Pro 2012 SR2 - Luxrender 1.0RC3 - Pose2Lux
Hardware: iMac - 3.06 GHz Core2Duo - 12 GB RAM - ATI Radeon HD 4670 - 256 MB