also how do u have your ventilation set up? like how many fans and where are they placed on your box? and how well do they work to cool off your box?
For ventilation i have 2 80cfm fans.One for intake and one for exhuast.I have them parallel two each other in the middel of the box.Witch was a big mistake.Now becuase they are parallel the intake air goes rite for the exhaust fan.And now it has created a wind tunnel effect.Wut i should have done was put the intake at the very bottom of one side and the exhaust at the very top of the opposite side.This is better for 2 reasons.1 the wind tunnel would be gone.And heat raises so it makes for better heat exchange.Oh yea and the plants feed from the bottom up so its good for that too.
Or i should have used both fans for exhuast,and just cut an intake vent with stove filters over it or something.It gets really hot in there,and now that its getting really warm outside that is becoming an iusse for me cuz my box use to suck the air from a near by window that would cool it down.
To bad i didnt have enough room for a circulation fan too,cuz that would make the major difference i need to solve this.
I got my 2 fans from radio shack for $20 each.U will have to wire a plug to them to make them work thow.U have to find the ones that run on 110 volts or ull need a DC converter.
Trust me man go with a bigger space then wut u got .It will make a world of a difference.I wish i did.
And b4 for u build or buy anything ask or post ur pix and we can try to build something similar but on a bigger scale.With new mods to solve som problems i got