True, mine are 2700K. Damn if i can remember where I saw that..oh well ya live and learn.
6500k / Full Spectrum for veg
2700k for flowering
A good rule to live by is 5,000 lumens per square foot. This will give you maximum yield for CFL growth.
You can leave your lights on 24hrs during veg until you reach adequate growth. During this period you are using the 6500k bulbs.
When you switch to 12/12 change the bulbs to 2700k. I generally keep 2 full spectrum tube CFL's during flowering in addition to the 2700k bulbs. When your plant is in it's natural environment it receives the full spectrum from the sun. Just make sure the closest lights to the plants and the most lumens are remaining with the 2700k bulbs during flowering.
A good target as I said before was 5,000 lumens per square foot so generally most CFL grows will have close to or more then 20,000 lumens on the grow area. This doesn't sound like much but keep in mind the key is how close you can keep your lights in a CFL grow area. There is virtually no heat so you can often have your bulbs 1 - 2" from the tops of the plants maximizing the absorbtion of light in the plant. I forget what the exact formula is but for each foot in distance beyond the first 1 foot of distance from the light, lumens drop dramatically. So if you are using an HPS system with 70,000 lumens and your light is 3 - 4 feet above your grow area, you may be getting less lumens then the grower with CFL's 2 inches above the tops.
I hope someone finds this helpfull!