Build by linked hollow helixes this lamp takes full advantage of 3D printing freedom.
The light distribution is homogeneous, the used white nylon material gives a warm light.
Direct look to the lightsource is mostly hidden.
The surface facets visible simple comes from STL triangulation.
You can buy this article from Shapeways.
Best Shapeways material: White Strong Flexible polished.
Tumble finishing can be used to polish.