Poor incandescent bulbs. They had about 100+ years of dominance, but now it's the era of energy-efficient compact fluorescent. And this triumph of the CFL has been archived for future historians in the most permanent record known to our culture: a T-shirt. If you'd like to see this clever garment actually be produced, make sure to vote over at Threadless. [Threadless via superpunch]
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@nocar: Yeah, they can pump out some horrible color. Pay attention to the "color temperature." Look for lamps that push light in the 2800 to 3300 K "warm light" range, they approximate incandescent light.