I will second that cfls and t5s both produce heat on par watt for watt with HIDs
CFLs of T5 are both fluros, I prefer the T5s because they are much safter and you have one fixture, with one cord, that can be raised and lowered with ease to work on your plants. As far as growing, as long as the watts are the same cfl and T5 are the same. T5's are just easier, safer, and more practical. The results will be the same either way, watt for watt.
a 4'x4tube T5 is approx 200watts. You would need almost 10 of the 28 watt bulbs or 4 of the 55watt bulbs to equal that, but you would never get the same even light spread the T5 fixture would produce being in a single hood-the light travels straight down from the bulb/hood and evenly covers the 4'x16' foot print much better then the cfls could.
And cheap hood, ballast, and inline fan can be found on ebay for less then 250 bucks and it will blow cfls and t5s out of the water. Fluros can never touch HIDs in the penetration department. Grow your plants taller then a foot and the fluros have a hard time penetrating the canopy at all-most cfls growers compensate by hanging cfls lower and all over the place. I usually see people with a ton a cfls and often think about how much money they wasted and how messy/dangerous their set-ups look. They are great for super small spaces or your first couple grows but you should at least step it up to a T5 as soon as you can. Hey they work so you can't knock them, I just think time and money is better spent on the T5s or HIDs.
499 actual watts at 2700k , also 136 watts of 6500k , 31,200 thousand lumens uguys think that will do the job for flower all the way?
Then I didn't have enough intake and had a panda film implosion...
