Thanks, Quix, and no problem for not reading through the entire journal. Actually, all of the equipment I'm using is listed on the first page of my first journal, but the LED is a LightHouse BlackStar 180w. I have not measured actual wattage, but I did see another grower measure 157w actual draw on his. I also saw a side x side comparison with the BS 180w vs. a 300w from a former sponser that, from everything I've read, had quality lights. The two grows were deemed comparable. I personally thought the 180w outperformed the 300w when some other factors were considered, but even if they were the same, the costs would be lower with the 180w, which is fine for a 2' x 2' space. The 300w may be more effective in a larger space.
My personal experience is this...
First, as a disclaimer, in my flower chamber I have (4) 23w 2700k CFL's along with the BS 180w LED. Also, bear in mind I've only harvested two plants that were essentially grown together under the same conditions, and both were over 3' tall when they finished, but they were two different strains.
So, the buds on BOTH the AK and the Haze are much more airy than I would have hoped. The Haze isn't too bad, at least not as bad as the AK, but still not the nice dense nug's I would like to see. I have heard airy buds attributed to LED's, so I'm NOT ruling that out as a possible cause, but the scientist in me want more testing before making a final conclusion.
Part of the reason I'm flowering only one plant right now is so I can focus all of the light on her. I'm also keeping the lights much closer to the top of the canopy than I did on the last grow. If I still get airy buds, I may add another four CFL's and mix the spectrum a little, but that would also limit my space even more, which I'm not keen on.
So, all that being said, I did manage to pull 4.25 oz. off of those two plants in that small space, and 4.25 oz. of quality meds is 4.25 oz. of quality meds, even if it is a little airy! And, I'm not, in any way, considering going to either a MH or HPS in that small cab for numerous reasons. I'm definately happy with the LED for a first grow and pretty confident I'll be able to find the right "formula" using LED's & CFL's.
I hope this helps!