yo platinum,
unfortunately, ccfl lights are not covered in that faq!
I would not say that it's impossible. The vegetative stage is a sure deal as led grows with less light intensity have shown; the question is whether or not these lights have to potential to be used in the the flowering stage.
The FAQ does give one some important data to consider:
it says that a healthy plant, simulating the outside conditions of a blazing sun, is 10,000 lumen/sq. ft. A lumen is the measurement of candellas per m2 at a distance of 1m, but it is weighted based on light wavelength, as it is founded on the human eyes who are more sensitive to some wavelengths over others. To say that a plant simply needs this many lumens per sq. ft. is really overlooking a lot of factors, i.e. light quality, and simply a good rule of thumb when using the technology that everyone else uses. But the measure of lumens per sq. meter is the lux. The FAQ claims one needs a lux of 10K lumen/sq. ft. For my purposes, I'll use meters. To change over, divide by 10.76: 926 lm/m2.
926 lm/m2 is the density of light on a surface of one sq. meter. That means that the cold cathode lights, rated to 30,000 cd/m2, are converted into 30,000 lumen/m2/sr (steradian is a measurement for projecting a 2d measurement like m2 onto a 3d plane, like a circle on the surface of a sphere). And 30,000 lm/m2/sr (which doesn't mathematically affect the result) equals 30,000 lux. I recently purchased several red cold cathode kits, and a couple blue ones, 20 total. As both kits come with two lights, that makes 40. 40 x 30,000 equals 1,200,000 lux. My grow space is 1m. I think that should be sufficient.
I would love someone to correct my math and explain this better than I have. I am by no means an expert, but I am curious why no one has tried these lights! Have none of you seen the japanese plant chambers that you can buy for research!?! Guess what powers them... led's or ccfl's. But ccfl's have way more power. They are not as efficient, but much better than HPS when you consider that most of the power for a 400W system is put off in heat, maybe 25% light, and the plants are only using portions of that heavily. We'll see what happens...