5x5 grow tent - 1200 watts to much

[99corrupt]

Hi Everyone!

I'm new to both this forum as well as growing. I've done a bit outdoor growing as well as indoor. Both soil and Hydro. Now I want to have another go I currently own the following:

1 140 x 140 x 200 black box tent
1 sonlight ballast 600 hps
1 yaroots tank ( thinking of doing 8 plant of 11L pots, in each of the buckets )
500ccm carbon filter.

My questions is, would it be too much to add another sonlight ballast 600hps?

The grow tent will then have 180000 lumen, thats 90000 per square meter. I-ve read somewhere that is good to have somewhere in-between 65000 - 107000 lumen per square meter!?

Please advise.

Many tnx in advance.

TS

 

[David Bowman]

100,000 lumens/square meter is what the sun puts out on a sunny day so as long as you can remove the heat from the grow tent and minimize heat stress upon your plants, you will be producing an environment that is close to what can be obtained outdoors.

 

[99corrupt]

Hi. Tnx for the prompt reply. What would you recommend for bringing down the heat. I have one small fan and one quite large.

TS

 

[David Bowman]

Your grow tent is over 130 cubic feet in volume, you have to consider the loss of CFM due to your carbon filter, and your trying to extract the heat from 1200 watts of HPS, so I would use both fans for cooling/extraction. I would use the largest CFM rated fan to cool your lamps down using air cooled reflectors and run outside air through both lamps and straight out the tent. The smaller CFM rated fan would be a good ventilation fan attached to the carbon filter to extract air from above using passive intakes below to keep air moving through your plants.