1 running what u want is no big deal but yes u want a cooltube design for sure ........i ran 2 600w in a 4x4x6 with no trouble
a.....your intake is very imporant u might need to lower it to lower the inside so plan on this
b.....again your intake think about powered intake
(look in my journals filter box is a powered intake with clean air)
c.......inside the tent u need to have a
clip on fan that moves ....with a powered intake and little ducting u can set the cool air to come up behide the fan there by spreading it out as it moves (here is simple trick get a old paint can can with weight in it go and get a peice of pine fur strip from the lumber store (98 cents for 8 feet) take it come cut it to 5 feet and then dut tape it standing on the paint can ......now u have a movable/twistable stand for the fan at any lvl u need )
d.......your exhust needs to be overpowered ....u use a varible speed controller to match near your intake so the walls do not concave in (looks like modern public art) .........if u are running a carbon filter make sure u account for this i had mine on a 400 cfm......powered intake somewhere in 210 cfm
as for led .........
have a look at Lush they have some good stuff and paypal so if u have dencet credit u can get bill me later just pay them 100 200 bucks a month ............i am looking at the change over myself for hydro ...........i did find a nice bulb tho for
MH 10k 1000w for finishing the plant up ( bunch of blue/uv light for resins)