I have been working with KS4.1 and IES lighting and have decided to share the model. It needs more elements adding to it, pictures, mirrors, shelves etc to be able to reproduce a more realistic scene but I have ran out of time on the demo license.
http://grabcad.com/library/interior-ies-rendering-test-studio-1/files = No furnishings just the base model
http://grabcad.com/library/interior-ies-rendering-test-studio-1/files/Renderings/ies%20profile = IES lighting profiles
http://grabcad.com/library/interior-ies-rendering-test-studio-1/files/Test%20Interior%20V2 has furnishings added and contains a KSP file too
Render test results ...
It would be cool if someone had the time to fill the scene with more items and to post their results.
All the best guys
Martin