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Offlinegrod31
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?s on watt per sqft-also how many watts per sq-ft do you have?
    #456131 - 08/07/10 12:42 AM (6 years, 4 months ago)

so i have been reading what we want to aim for is 50 watts per sq-ft.
to find your watts per sq-ft you divide your square feet into how many watts you have??-seems right:shrug:-

i built a grow tent  7 feet by 4 feet  i have about 500 watts
this equals out to only about 17 watts per square foot
then i was reading when figuring out watts per sq ft only use the direct space lit. so my plants are 6'x3'(, okay-so that helps a bit now im getting 27 watts a foot.
I only have two plants.
what im asking is do people normally use 1000 watts in a 6'x3' area because that seems like so much.
also will 25 watts per sq-ft yield you half as much as 50 watts per sq ft- or does that have more to do with lumens and other factors?
any help is appreciated.


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And when it comes to that fantastic note
where the rabbit bites its own head off,
I want you to THROW THAT FUCKING
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    Not me.  It would blast you through
the wall stone dead in ten seconds and they'd make me explain.


Edited by grod31 (08/07/10 01:45 PM)


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InvisibleHarry_Ba11sachM
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Re: watts per sq-ft [Re: grod31]
    #456265 - 08/07/10 09:14 AM (6 years, 4 months ago)

people generally use 1000W in a 4x4, so using 1000W in a 6x3 would actually be considered very little


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Offlinegrod31
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Re: watts per sq-ft [Re: Harry_Ba11sach]
    #456266 - 08/07/10 09:39 AM (6 years, 4 months ago)

thats what i was thinking.
so your saying i will not get what im expecting or ill get jack shit?
i can only fit one of my plants in 4'4'
so what i am getting from this is if i dont have 2000 watts over my two plants it would be considered "very little" ??

why would i be told
Quote:

DieselB said:
You'd be surprised what you can do with a 400w light, you may end up a lot less dissapointed than you think.





also will 25 watts per sq-ft yield you half as much as 50 watts per sq ft- or does that have more to do with other factors?
any help is appreciated.
should i even attempt to finish these plants?
will going from outdoors to only a 400 watt HPS and 120 watts of CFL herm up the plants?


--------------------
DO NOT USE mushmagic.com- THEY LIE AND SELL DRUGS TO CHILDREN :thumbdown:
--------------------------------------------------
Back the tape up.  I need it again!
Let it roll!  Just as high as the fucker can go! 
And when it comes to that fantastic note
where the rabbit bites its own head off,
I want you to THROW THAT FUCKING
RADIO INTO THE TUB WITH ME!
    Not me.  It would blast you through
the wall stone dead in ten seconds and they'd make me explain.


Edited by grod31 (08/07/10 11:15 AM)


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Invisiblemaryanne3087
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Re: watts per sq-ft [Re: grod31]
    #456328 - 08/07/10 01:33 PM (6 years, 4 months ago)

6x3' or 7x4' is an odd space for one light.

I'd use 3 x 600w's for a 7x4' area

600w = 3x3 or 3.5 x 3.5' max imo, some people do 4x4' for a 600w but get fluffy ass buds.

a 1000w can cover a 4x4' - 5x5' space any more and you're growing fluff.

2 x 1000w's or 3 x 600w's would be a good choice for that space in my opinion.


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Offlinegrod31
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Re: watts per sq-ft [Re: maryanne3087]
    #456331 - 08/07/10 01:42 PM (6 years, 4 months ago)

yes i have gathered that information.
i made the tent with what i had/could borrow/afford with basically no money
i have never grown indoors and im not planing on it after these plants.
thanks for responding
any response to the last questions i asked?>


--------------------
DO NOT USE mushmagic.com- THEY LIE AND SELL DRUGS TO CHILDREN :thumbdown:
--------------------------------------------------
Back the tape up.  I need it again!
Let it roll!  Just as high as the fucker can go! 
And when it comes to that fantastic note
where the rabbit bites its own head off,
I want you to THROW THAT FUCKING
RADIO INTO THE TUB WITH ME!
    Not me.  It would blast you through
the wall stone dead in ten seconds and they'd make me explain.


Post Extras: Print Post  Remind Me! Notify Moderator
Invisiblemaryanne3087
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Re: watts per sq-ft [Re: grod31]
    #456388 - 08/07/10 04:48 PM (6 years, 4 months ago)

As for yield vs watts/sq ft.

I think your yield will be greater per watt to be honest, but instead of say 2lbs of rockhard buds from a 1kw in a 4x4' area you'll end up with 2.5lbs of fluffy or less dense bud in a larger area. Generally the more floorspace you cover the more bud you grow, however it wont grow as dense.


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InvisibleHarry_Ba11sachM
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Re: watts per sq-ft [Re: maryanne3087]
    #456482 - 08/07/10 08:11 PM (6 years, 4 months ago)

Quote:

maryanne3087 said:
2 x 1000w's or 3 x 600w's would be a good choice for that space in my opinion.




Absolutely :thumbup:


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Offlinepunkrocker292004
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Re: watts per sq-ft [Re: Harry_Ba11sach]
    #456608 - 08/07/10 11:35 PM (6 years, 4 months ago)

im only using a 150 hps 4 2 plants or 4 autoflower


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Offlinegrod31
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Re: watts per sq-ft [Re: Harry_Ba11sach]
    #456745 - 08/08/10 11:40 AM (6 years, 4 months ago)

Quote:

Harry_Ba11sach said:
Quote:

maryanne3087 said:
2 x 1000w's or 3 x 600w's would be a good choice for that space in my opinion.




Absolutely :thumbup:



yeah seriously i got that before i made the post. your the 3rd person to tell me what i all ready knew.
can anyone answer what i asked...
geesh the growery is pretty wack.
this place need like 10 years and 100,000 more people before its any use.
with almost everyone of my post that is a question i didnt get any new information.


--------------------
DO NOT USE mushmagic.com- THEY LIE AND SELL DRUGS TO CHILDREN :thumbdown:
--------------------------------------------------
Back the tape up.  I need it again!
Let it roll!  Just as high as the fucker can go! 
And when it comes to that fantastic note
where the rabbit bites its own head off,
I want you to THROW THAT FUCKING
RADIO INTO THE TUB WITH ME!
    Not me.  It would blast you through
the wall stone dead in ten seconds and they'd make me explain.


Edited by grod31 (08/08/10 11:42 AM)


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InvisibleHarry_Ba11sachM
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Re: watts per sq-ft [Re: grod31]
    #456754 - 08/08/10 12:18 PM (6 years, 4 months ago)

What question did you ask that hasn't been answered? as far as I can tell we addressed all of your concerns.


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Offlinegrod31
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Re: watts per sq-ft [Re: Harry_Ba11sach]
    #456760 - 08/08/10 12:21 PM (6 years, 4 months ago)

Quote:

grod31 said:



also will 25 watts per sq-ft yield you half as much as 50 watts per sq ft- or does that have more to do with other factors?

should i even attempt to finish these plants?
will going from outdoors to only a 400 watt HPS and 120 watts of CFL herm up the plants?




--------------------
DO NOT USE mushmagic.com- THEY LIE AND SELL DRUGS TO CHILDREN :thumbdown:
--------------------------------------------------
Back the tape up.  I need it again!
Let it roll!  Just as high as the fucker can go! 
And when it comes to that fantastic note
where the rabbit bites its own head off,
I want you to THROW THAT FUCKING
RADIO INTO THE TUB WITH ME!
    Not me.  It would blast you through
the wall stone dead in ten seconds and they'd make me explain.


Post Extras: Print Post  Remind Me! Notify Moderator
InvisibleHarry_Ba11sachM
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Re: watts per sq-ft [Re: grod31]
    #456781 - 08/08/10 01:04 PM (6 years, 4 months ago)

well that first question has already been answered by maryanne

Quote:

maryanne3087 said:
As for yield vs watts/sq ft.

I think your yield will be greater per watt to be honest, but instead of say 2lbs of rockhard buds from a 1kw in a 4x4' area you'll end up with 2.5lbs of fluffy or less dense bud in a larger area. Generally the more floorspace you cover the more bud you grow, however it wont grow as dense.




Quote:

grod31 said:
should i even attempt to finish these plants?
will going from outdoors to only a 400 watt HPS and 120 watts of CFL herm up the plants?




yes.

and no.


--------------------


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Offlinegrod31
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Re: watts per sq-ft [Re: Harry_Ba11sach]
    #456800 - 08/08/10 01:54 PM (6 years, 4 months ago)

k thanks
i woke up a lil :crankey:
im still interested to hear other peoples watt to sq ft ratio
i bet alot of people/new growers never even figured it out
i thought my friends 7'8' grow room with 1000 watts had good light for 4 plants but i was so wrong. thats only 17 watts per sq ft!!
i told him and he :shrug: he said he doesn't care because "his budz are fat"


--------------------
DO NOT USE mushmagic.com- THEY LIE AND SELL DRUGS TO CHILDREN :thumbdown:
--------------------------------------------------
Back the tape up.  I need it again!
Let it roll!  Just as high as the fucker can go! 
And when it comes to that fantastic note
where the rabbit bites its own head off,
I want you to THROW THAT FUCKING
RADIO INTO THE TUB WITH ME!
    Not me.  It would blast you through
the wall stone dead in ten seconds and they'd make me explain.


Post Extras: Print Post  Remind Me! Notify Moderator
InvisibleMagashM
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Re: watts per sq-ft [Re: grod31]
    #456801 - 08/08/10 02:03 PM (6 years, 4 months ago)

Fat airy buds or buds like this Myself I'll go with the buds grow under the right light. He may like his big buds but he's not even getting half the yield he could be.

and try doing this with 17 watts per foot
Dixie Cups , dirt, and a light = half pound



Keep the light at 50watts per sq foot simple as that. :wexican:


--------------------
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InvisibleStonethM
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Re: watts per sq-ft [Re: grod31]
    #456802 - 08/08/10 02:03 PM (6 years, 4 months ago)

Quote:

im still interested to hear other peoples watt to sq ft ratio



OK, my room is 3 foot wide, 2 foot deep, which is 6 square feet and I'm running a 400 watt light.  So that's like 66.66 watts per square foot.


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Offlinegrod31
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Re: watts per sq-ft [Re: Stoneth]
    #456843 - 08/08/10 04:32 PM (6 years, 4 months ago)

nice, anyone else?
Quote:

Magash said:
Keep the light at 50watts per sq foot simple as that. :wexican:



shit if i had any money left they would get more The last 50 bucks i had i spent on two 65 watt (300 watt equivalent) cfls and fixtures;to at least get a more full spectrum.


--------------------
DO NOT USE mushmagic.com- THEY LIE AND SELL DRUGS TO CHILDREN :thumbdown:
--------------------------------------------------
Back the tape up.  I need it again!
Let it roll!  Just as high as the fucker can go! 
And when it comes to that fantastic note
where the rabbit bites its own head off,
I want you to THROW THAT FUCKING
RADIO INTO THE TUB WITH ME!
    Not me.  It would blast you through
the wall stone dead in ten seconds and they'd make me explain.


Post Extras: Print Post  Remind Me! Notify Moderator
InvisibleHarry_Ba11sachM
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Registered: 04/20/08
Posts: 11,753
Loc: Nepal Flag
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Re: watts per sq-ft [Re: grod31]
    #456852 - 08/08/10 04:49 PM (6 years, 4 months ago)

I'm running 1200W over 16 square feet


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Invisiblemaryanne3087
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Re: watts per sq-ft [Re: grod31]
    #456899 - 08/08/10 06:39 PM (6 years, 4 months ago)

I'm running 3600w over 64 sq ft which is 56.25 w. However I include my walking space in that it's closer to 70 w per sq ft.




Quote:

grod31 said:
Quote:

Harry_Ba11sach said:
Quote:

maryanne3087 said:
2 x 1000w's or 3 x 600w's would be a good choice for that space in my opinion.




Absolutely :thumbup:



this place need like 10 years and 100,000 more people before its any use.
with almost everyone of my post that is a question i didnt get any new information.




It could just as easily be said that if you had more reading comprehension that the grower would be more useful to you.

For the record, I hang with a lot of commercial growers and they all provide substantially more than 50w per ft. Watts per square foot is also relative to how high your lights are hung. I keep my lights down as low as possible without burning the tops of my plants. Light from artificial sources diminishes in intensity rather rapidly. 3ft from the bulb you're getting 10% of the initial lumens from the bulb at 4 ft the lumens are more benign. The distance and percent varies a little between the 600 and 1000w bulbs with the 1000w's having more penetration power (able to deliver some lumens to a further distance).


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InvisibleHarry_Ba11sachM
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Re: watts per sq-ft [Re: maryanne3087]
    #456956 - 08/08/10 09:14 PM (6 years, 4 months ago)

the light intensity diminishes exponentially with distance regardless of the initial wattage. And yeah, 50w/ft^2 is a minimum in my opinion. I'm running 75W per ft^2 and quite frankly still feel like I have some dark corners in my closet


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Invisiblemaryanne3087
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Re: watts per sq-ft [Re: Harry_Ba11sach]
    #456972 - 08/08/10 09:35 PM (6 years, 4 months ago)

How high are your lights hung over your canopy to put watt/sq ft in perspective? I've hung my lights high in the past not being fully aware of how quickly intensity diminishes and believe that was the only thing keeping my yields from being stellar. Hopefully with near gear and being able to drop the lights down low I'll be able to yield impressively this time around.

It would be really cool if there was more of a benchmark for the footprint of your bulb but most people don't have lumen meters to measure light intensity at the canopy level, myself included. Is PAR radiation similar to lumens in regard of how quickly they diminish when traveling a given distance?


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