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CF = Compact Flourescent (as opposed to a normal flourescent bulb you'd find in the typical shop light)What's the CF in the 65 watt fixture mean???
Another thing: K = Kelvin and refers to color temperature. Anywhere from 5500 to 10000 K is good for plants. You just have to decide what color you like better. Avoid "Actinic" light. That's for reef tanks and doesn't do much for plants.
Then, you have to look at spectrum. Ideally, you want a spectrum that plants can use (the right wave lengths in red and blue), but from what I understand (and I may be wrong) most lights within the 5500-10000 K will have at least SOME of that.
Then, there's PUR and PAR, and that's WAY over my head.
There is a really good in-depth sticky about that in the "Lighting" forum.
In case you're curious, I have a 48" tank and use 2 "dual daylight" bulbs (mix of 6700 K and 10000 K). The fixture is 130 Watts (65 for each bulb).