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http://www.vtnews.vt.edu/story.php?relyear=2008&itemno=111Cool - a gravity-propelled clockwork light - except for the "yellowing and crazing will tend to mitigate the unnatural blue hue". First, I've never seen an acrylic lens go crazy. Creased, yes ;).
Second, what's unnatural about the milky blueish tinge? It looks hundred times nicer than the bloody yellowish, batteries-dying hot bulb hue. What's "natural", the lightbulb, candle or the fire in the cave? Sky is natural! I love the blue(ish) but can't buy it anywhere anymore (either LED or neon-like).
I have seen only one type of lightbulbs so far where they state the color temperature on the box (kudos to GE, but then all other bulbs they have are totally without color info - and their "white" is anything but). I'm definitely not buying any "soft blue" swirl bulbs, because they're painted into the same old yellow that I've always hated. Luckily, I'll probably be able to bridge this, as all the swirl bulbs we bought in 2001-2003 still work, and that was before they learned how to taint them. By the time they may need replacement, I hope LEDs with adjustable colors will be available, or I'll be able to remove the filter and have it au naturelle.
