1K per any 4x4 area is overkill........spectrum over intensity as long as enough is supplied (light)....
Did Mr stikk even read the linked posts or are you going by green house standards or some MM growing bible as, what "Industry standards" are we going by? More is not always better. You
seem to not understand how the plant reacts to lighting through out the day or "lights on" time.
Jorge Cervates did some of the best lighting research on MM and Ed Rosenthal did some interesting lighting studies on PAR and Pfr spectrum use by plants (MM). Have you researched any of these?
I use 1K's and in a chain, each designed to cover a 6x6 overlapping area. So then, in a 12x24 there are 8 lights covering that area. I run it all. Indicas, Sativa's and cross's. I have absolutely no problems with even Landrace Sativa's as far as light intensity goes! Why would I or anyone else need 12 1K's in that space to supply lighting intensity? Have you ever been in a commercial grow of warehouse size? The 6x6 footprint is their standard! Some do a larger footprint...
Wait! I got one for you....
www.rollitup.org/t/12-12-form-seed.873071
Look at Mr Goodsons post.....See that? NICE plants eh? Vegged with T5's and finished with 150w of HPS.
Lets do some math here.....2x2 area, 150w HPS x 4 = 600w in a 4x4 area! Huh, wasn't that what I suggested?
You
might consider some side lighting for full house landrace Sativa's with 600w in that space, but that would be strain dependent....
Look ttystikk, I mean no insult!
I did not "yell" above and I am not "yelling" now.....
I think you have some very good skill's.
But 2 1K's in a 4x8 area
is overkill!!!!
His heat problems aside....he does not, and will not ever,,,
need that much lighting in that area....Why put so much extra $ into the utilities pocket?
Respectfully
Doc