For veg you need 6300k daylight/bright white bulbs.

For bloom you need 2700k warm white.

That's all you need in CFL.

Maybe you should think of growing in something a bit bigger than a PC case.

You can make a good grow box out of plastic storage boxes or old cooler boxes. People will pay no attention to those boxes.

Having a bit more space will give you a much better yield. It's just something to think about. Plants will do better when they have about 30cm each to spread out.

Anything less than that and your plants will begin a battle for the light and they will put too much energy into growing taller than the others. This gives less energy towards bud production.

I experienced this on my last grow. I had to kill off some plants so I could get a good yield.

Good luck with it.