5500k vs 6500k cfl for vegetative

Btw this is my first ever grow...

I got 4 lil baby plants right now, 3 of them are less than a week old and one is just over 2 weeks. I've been using 5 cfl's for my grow so far (2x 15.5w, 3x 14w), and aware that I need to get some more bulbs to up the strength of the light for them. Also, I realized that all 5 bulbs i've been using are 2700k so i guess that explains why they haven't been growing as well as they could be.

So, after hours of researching different lights online, I decided not to switch to hps or led and just stick with the cfl's. I'm trying to get the best and most efficient bang for my buck. I narrowed down the thousands of options to these two:

• a 2-pack of 5500k photography cfl's that run 135w
  
• a 2-pack of 6500k photography cfl's that run 105w

Basically the same thing, only differences are the light temperature (5500k vs 6500k) and a 30-watt difference. They're also just about the same price, so all I really am concerned with before I buy is understanding which is more important or will lead to faster/more efficient growth for the vegetative stage. Would my plants grow well under 5500k or would my plants be happier getting the 6500k?

 

I figure that since I already have 2700k bulbs i'll just get the 6500k and supplement with the others to give the plants a broader spectrum. When they are ready to flower I'll remove one of the 65k or get some stronger 27k bulbs