How Much will 400W HPS cover Optimally?

Basically what it says, I want to build a cabinet, and would like to know how much FLOOR SPACE a 400W HPS will OPTIMALLY cover.

Sgt.Sly said:

Basically what it says, I want to build a cabinet, and would like to know how much FLOOR SPACE a 400W HPS will OPTIMALLY cover.

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Guides say 4' x 4', from experience I fell like 3' x 3' is optimal, about 10 plants or so.

2. five foot monsters

Someguy15 said:

Guides say 4' x 4', from experience I fell like 3' x 3' is optimal, about 10 plants or so.

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Where can i find a guide?

dude check out the link in my sig for my grow.

I have a grow cabinet that is aporox 20in x 36in and i have a 400 w in there.

I have 5 girls in there right now in their 2nd day of flowering.

The 400 w is a bit tricky in the begining stages ( I had my seedlings under my 400w MH) and it caused a bit of buring, not nute burn but regular burn.

However, my girls lived though it and the result has been some crazy condenced growth.

CC

As for your like standards, when i was planning my grow cabinet I found this helpful

https://www.rollitup.org/view.php?pg=faq&cmd=article&id=59

however, you need to think about your spacial constraints and lumen penetration in terms of height.

CC

I built a 2x6 cab (more like an armoire) that houses 2x400w. A footprint of 2x3 for each light.

Sgt.Sly said:

Basically what it says, I want to build a cabinet, and would like to know how much FLOOR SPACE a 400W HPS will OPTIMALLY cover.

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well i'd say that depends on the hood you go with.it's been my experience that 2'6''x2'6'' with out a hood worked great for me.all direct light that way and less heat.

mr. greenthumbs said:

well i'd say that depends on the hood you go with.it's been my experience that 2'6''x2'6'' with out a hood worked great for me.all direct light that way and less heat.

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Strait up bulb, no reflector, in a cab 2'6x2'6 and how tall?

Without a shade there's less heat ?

I have a white shade arched and open at both ends.

So will a 5'x2' be ok? I really can't afford a stronger light or the light bill that'll come with it.