I love the reasearch on the alternative lighting options. LEDs have come a long way in just a couple years.
I have been doing some research on the CCFLs to understand them better. They do come in 6500K, 7100K, 8000K and 8100K, but I don't think the computer case ones are those colors (there are other, less desirable colors that seem to be more common). The spectrums I have been able to find for the whites seem to indicate a broad strength of many colors, not the intense spikes in focused areas of a typical aquarium bulb.
The colors are produced by using a phosphorus coating on the tube. I don't believe that filtering the spectrum in this way will produce the type of light we are looking for.
The term "cold" in cold cathode means that the cathode is not intentionally heated as a means to initially excite the electrons (as in traditional applications). The cathode does get very hot, though, in normal operation. The endcaps on these have the potential to be quite warm.
It seems that CCFLs may have a place in aquarium lighting, but that the product needs to be geared for the purpose with additional development.
I definately don't want to discourage experimentation, but did want to share what I learned with a hour's worth of research. I am a EE by degree, but am not terribly fluent in lighting.
I look forward, with optimism, to seeing if you can make these work. I am especially stoked about the little hyperlight and the 4" CCFL options. Go Picos!