Sorry about the english but I am spanish and I dont speak to much...

I have a closet with 1 square meter and a 400w hps to grow Ice, White Widow and Double Gum.
I need ventilation and more thinks right?

Anyone can help me with that please...?

thank you**

yes you will need more ventilation. the 400w hps will make a lot of heat

Ok... Thanks... So I wanna use computer fans for ventilation and for air out... For 1 square meter I absolutly need 400w?

i dont computer fans will be big enough. and you do not absolutely need a 400w. you can use a 250w in that space

wow... sorry.. I forgot, I have a little closet with 31 inches per 16 inches per 67 inches (80cm per 40cm per 1,70cm) to... Do you think thats will be more apropriated...? And about the light and ventilation for this space, what I need?

I hope this site will help with your different questions.

The Grow Room.

thank dudes.
and about my "mini" closet... anyone can help?

That would be perfect to grow sea of green 6 plants. Put in a shelf at about 50 inches and use the top for starting plants and cloning under a few cfl, spiral flouros, hang your 400watt HPS under the shelf and grow 6 plants at a time. the bottom is used for flowering. You'll have to grow short plants like no more thas 30 inches, but after 6 mos. you'll have a continuous supply of bud! An oscillating fan about 6 inches in dia. should keep the plants cool , you may have to get a separate fan to cool the light. Actually a 250 watt Hps would work in this space, but if you already have the 400W, use it, up to a point, more light is better!

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Life is good, the water is sweet. The ground keeps moving beneath my feet.

Thanks man! your help was precious.
but what do you meen by "mos" and "dia"!?

thanks to everyone!

lots of smoke