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Once Willenz settled on a shape that was somewhere between Jasper Morrison's Glo Ball lamp and an "upside down acorn," the process then progressed to the integration of colored glass. The pigment starts out more opaque at the top of the light and fades in a gradient as it reaches the clear but textured base. This creates a kind of built-in lampshade, shielding the viewer's eyes from the bare bulb. Willenz picked smoky greys, browns, and purples, which gave the already '60s-style shape even more of a retro feel. "I was okay with that," he says.