the max yield you can get with a 400 watt is 400 grams which is a little less than a pound i always go with 600 or 1000 watts

the max yield? thats just a rough figure for people to reach. Its very possible to get 500 gram, not easy, but its more likely that someone recieves only 300 gramms. all about the genetics and the green thumb.

400 all the way.I use 3~400w check it out !!

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LEGAL MONTANA MEDICAL PATIENT (ORGANIC) http://www.rollitup.org/grow-journals/195038-organic-montana-medical-grow.html#post2510183

That sounds wrong if 400w = 400g, or it's for one plant?

But you can push up to >600g in m2.

One last question about grow space,
I will grow 10 plants (The Church and The Doctor) and with my grow space (1525x1525x1525cm) will be enough? I hope that tight space won't effect yield.

Thanks for your help,

Mari.

The 400w = 400g is based on the assumption that a good grower can get 1g/w out of a grow, but this is by no means a maximum, and is not necessarily achievable, depending on the strain..
I assume those measurements were in mm, which would give roughly 25sq ft, more than enough space to grow 10 plants. A 400w will cover an area between 2.5x2.5' to 3x3', and you might just squeeze 10 plants in there, but you will need to flower quite early to stop them getting too big and shading each other.
The space won't affect the yield, it's the amount of light you put in there. General consensus is that a 1000w will cover a 4x4' primary growing area, with an extra foot around the edge of secondary lighting.
I would suggest getting the biggest light you can afford to run and keep cool. I have a similar sized space as my flower room, but I only grow in a 3x3 area under a 600w, with 6-8 plants at a time doing a perpetual grow. I usually get 40-50g per plant, and harvest 2 every fortnight.

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Originally Posted by ceestyle
Don't be a martyr wasting $100 or more on CFLs to prove they're inferior for flowering pot.

One last question, could you post the right temperature and the right humidity, which I need for growing.

Temps should be between 75-80 degrees..............


Or just look in the FAQ: http://www.rollitup.org/view.php?pg=...article&id=582

http://www.rollitup.org/view.php?pg=...article&id=582

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Originally Posted by ceestyle
Don't be a martyr wasting $100 or more on CFLs to prove they're inferior for flowering pot.

Hey, thanks for the link!