Hi,

If you only have a 2ft x 2ft area you won't need to run both lights together, one is enough. That's the first I've seen of a 300 watt CFL. I have a 200 myself and I like it. You should use the 6500k for veg and the 2700k for flowering. It doesn't say what the lumen output is for the 300watt bulbs, I'll assume it's about 18,000 lumens. Running both of them would give you 36,000 lumens and use 600 watts of power. A 250 watt HPS gives out about 35,000 lumens and only uses the 250 watts. A 250 watt HPS doesn't need to be placed that far away from plants. If your house isn't too warm you can place it 6-10 inches above your plants. Plus, one HPS will take up a lot less room than 2 large CFLs. CFLs are good, but you can see in this case you will be using over twice the amount of power to get the same result. CFL have the benefit of being able to place them an inch or two from your canopy, but they do not penetrate the canopy as well as HID lights. But like you said, try it out and see what you think. You have more than enough light with the CFL anyway. You should have between 3,000 and 5,000 lumens per square foot, and you will have 4,500 with just one of those monster CFLs.

The tent looks good, I have a dark room tent myself and it's still going strong.

The extractor fan doesn't give a CFM or CMH rating, make sure the intake fan is less powerful than the extractor, or the carbon filter won't work. If the intake is too powerful, the smell will escape through the intake. The ventilation setup you will have looks excellent, especially for a room of that size. Just make sure the air in the room is fresh, the plants can use a lot of CO2, especially with that much lighting.

Soil growing is good, and it's harder to make a mistake. It looks like you have a good setup and I think it will go well for you. I've never grown autoflowering strains, I hope it goes well for you