CFL Spectrums

I see most professional grow CFL's use 2700k, 6400k, 25000k.
But some mention 3000k or 5500k bulbs.
Is there an advantage using 3000k with 2700k during flowering, or is 2700k all you need?

There is nothing wrong with throwing in a few that are not the same as the other bulbs. Mixing up the spectrum doesnt hurt, as long as you keep mostly to the spectrum needed...for veg you want to stay with the 6500K, and for flowering you want the 2100K. I currently have 5 6500K and 2 4100K lighting my 1 plant and i have some incredible results. Check out my gallery for the pics.

I have never seen a 2100k.
I find spectrum graph charts showing a basic difference between LED vs. CFL vs. MH vs. HPS.

Is there a chart to compare the most common CFL spectrums only?
ie: the wavelengths for 2100k, 2700k, 3000k, 4100k, 5000k, 5500k, 6400k, 25000k.
I would be interested to see the info, if it is available.
I just cannot find it.

I am very curious.
Does 2700k hold all the flowering spectrum I need?
Would 500w of 2700k flower same , worse or better than 400w of 2700k & 100w of 3000k?

Reasoning: If a mixture is better, I could use less wattage and perform the same.

Would really like to find a graph comparing CFL's only.