Light and geometry studies

I saw this nice videos about edges so it got me to study about lights and values again.
I made a scene with primitives on Blender to help me out with the shadows and lights.
Here is the result:

And the render:

 The video that motivated me to do this study:
 Webisode 7: The Conceptual Edge

And the last two cgtalk dailysketches:
 Blueseas

 Vice squad