On this test run of the experiment, I combined what I call "Betons method" (Beton explained to me to set the lights in a "random", dome like fashion), and full IBL, the settings in the IBL room are 10,36,36 (quality, intensity, HDRI effect, respectively). The radial lights have no shadow, and an intensity of 7, a bit high, a bit washed out... The cone is set to an intensity of 25, edge softness at 20, and shadows are ON at 50, 35 ambiance and softness respectively...

I dont think I ever tried this method to light an interior scene, its too noticeable the concentration of lighting sources...

All in all, I DONT like the result... the light seems too concentrated, and I just dont "agree" w/ the proceeds i selected to mat the scene :P I would go back, set the lights farther from the object and sphere in the corner, and maybe add some more atmosphere... I used 16 lights for the "random dome", and a few more for the "back" of the room. I think I can get better results w/ fewer next time around...

There are 3 kinds of people in the world. Those that can count, and those that can't..