Not sure where you are getting the "650 watts of CFL".
The 300 watt equivalent CFL would be about 85 "actual" watts each, for a total of
850 watts actual.
And, spreading the coverage from top to bottom, instead of one light source from above. In Rip's 2X2 grow area, I believe these puppies would blow the doors off a single 400 watt HID.
And Rip, Don't fall into the "lumen" trap. A lumen or lux, is a measurement of light intensity as "perceived" by the human eye.
Cannabis needs the red and blue spectrum's, not the intense "white" light as measured by, lumen's or lux.
An example of what I mean would be those red and blue LED grow-light setups, very expensive, but work very well.
Here's a site that explains a lot better than I can, LOL:>>>
http://www.superled.net/led-growing-faq.html
Hey...Good luck & good grow to ALL.......BB