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Have fun with that... I'm doing a 31"x31"x65" with an air cooled 400w. I have 300+cfm fan for exhaust and a 200 something cfm fan for intake. My temps run at 77-80* with 68* ambient. Yours will probably run in the close to 100* with the same setup unless you vent outside. Oh, and you do...

I run a homebox S with a 400w light in a cooltube. I have a 4" S&P fan for intake and a 6" S&P fan for exhaust + a carbon filter. Temps run around 78* with 68* ambient temps. It would be best to have Carbon scrubber > fan > light > exit tent

I got the same cool tube for a lot cheaper at mdhydro. I wish I hadn't though... The air cooled reflectors have much better light distribution.

You're wrong and have terrible spelling and grammar. I use a around a shot of H2O2 per gallon.

I start feeding when I see the first signs of deficiencies. Start out small, then gradually increase the amount of nutes.

1 ft is way too far from the plants for CFLs. BackDoorMan: Heat is what you DON'T want. Temps around 70* are ideal.

I got my 400w lumatek with cooltube, bulb, hangers, and cords for $300 from mdhydro. I think the 600w is only 20 bucks more or something like that.

Get more light. 400/ (4x5) = 20wpsf General rule of thumb is a minimum of 50wpsf

I'm using GH floranova and am going to switch to advanced nutes next. GH is saltier from what I've heard.

Flower after clones take root: 4/sqft This will result in budsicles. If you veg for a few weeks: 1/sqft

I did. Hempy buckets though. I might try E&F next. I just don't like soil. Hempy buckets are the best of both words (at least to me).

lumatek ballast, cooltube, ducting: mdhydro foothills carbon filter: ebay 6" and 4" s&p fans (intake, exhaust): hvacquick I recommend you always keep the passive intake flaps closed and only use active intake as it's not light proof.

Acoustic fans... link? I have an S&P 6" for exhaust and it's great. I plan on purchasing a 4" for my intake, too. hvacquick.com has the best prices that I've found.

It won't work. 2" passive intakes? Maybe for CFLs.

I remember reading that a plant receiving 10/14 produces significantly less THC than 12/12. I imagine 6/18 would be a terrible lighting condition for the plant.

I've been planning this SOG grow for quite a while now and want the biggest, tightest buds possible. I'm wondering if I'll have temp problems or if a 400w would be more suitable. The 400w would give ~59wpsf and the 600w would give ~88wpsf. At what point are the benefits of more wpsf diminished...