3000w LED | Cool hood | Extreme deleaf | grow jornal

BuddyColas said:

I noticed your post over on "12xCXB3590 Passively Cooled." You have the building led light bar support structure and wiring cleanly in wire channels part down. Those passive heatsinks looked very interesting to me also and would go right in place of the led squares you use now! I would likely try those myself if I was starting over. I really like his swivel feature as well. I am interested to see what you come up with for your flowering light scheme.

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I think I'll end up using regular plate heatsinks because they look cool and not require any other parts to attach.
and they are not so expensive after all...

I think it will look somethink like that
100 chips 10 bars 10 hlg240b @700
each bar 2 meters long and 20cm wide

it was getting to hot and crowded with not much air movement so I split the room in 2

12/12 day 55


made an artificial rain and wind for the veg xd

Im really looking forward to seeing some more pictures The Three A LIght technique has me interested, but Im not gonna buy a book at 500 USD.... Crazy stuff. Your new project seems great. I think I saw a comment talking about some upcoming bins with a 10% upgrade in light output. Look for those !

Herbal_Essence said:

I think I'll end up using regular plate heatsinks because they look cool and not require any other parts to attach.
and they are not so expensive after all...

I think it will look somethink like that
100 chips 10 bars 10 hlg240b @700
each bar 2 meters long and 20cm wide

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Thanks for the pics and update. It looks like they are finishing up nicely. Can't help but think that the white cobs will take it to the next level for sure. So basically 100 cobs over about 4 sq meters at 25 dissipation watts per cob. So correct me if I am wrong, but is that about 400 PAR watts per sq meter? Assuming you went with the CXB3590s.

BuddyColas said:

Thanks for the pics and update. It looks like they are finishing up nicely. Can't help but think that the white cobs will take it to the next level for sure. So basically 100 cobs over about 4 sq meters at 25 dissipation watts per cob. So correct me if I am wrong, but is that about 400 PAR watts per sq meter? Assuming you went with the CXB3590s.

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the area will be 5 sqared meters (2x3)
yes, I went with the cxb3590s 3500k

500 watts of LED (20 cobs@300-700ma) per sq meter.
how much ppfd you think I will have?

Herbal_Essence said:

the area will be 5 sqared meters (2x3)
yes, I went with the cxb3590s 3500k

500 watts of LED (20 cobs@300-700ma) per sq meter.
how much ppfd you think I will have?

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So 5 sq/mtrs about 700ma, about 25w a cob, about 64% eff. so I would say about 1000 PPFD. Is that what you came up with?

great pictures, man. youd just uploaded them as I was complaining for an update xD
http://rollitup.org/t/hps-killer-grow-journal.890304/ this guys is finishing up a grow with a somewhat lower ppfd than the one you plan on using. it may be of help to you to have a look. your stuff looks great, though. Id love to hear your exact method for defoliating. Have a nice evening

BuddyColas said:

So 5 sq/mtrs about 700ma, about 25w a cob, about 64% eff. so I would say about 1000 PPFD. Is that what you came up with?

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yes, that's about it. I will be ordering PAR meter right after the harvest so I can really dial it in and share the results.

benbud89 said:

great pictures, man. youd just uploaded them as I was complaining for an update xD
http://rollitup.org/t/hps-killer-grow-journal.890304/ this guys is finishing up a grow with a somewhat lower ppfd than the one you plan on using. it may be of help to you to have a look. your stuff looks great, though. Id love to hear your exact method for defoliating. Have a nice evening

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thanks ))

Herbal_Essence said:

12\12 07 VS
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12\12 56
View attachment 3617638 View attachment 3617639 View attachment 3617640 View attachment 3617641 View attachment 3617642

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Those buds are looking good! And on the 5th pic in there's significant ambering up of the pistils! I believe you said it's your third run...I think it will be a good one. Be interesting to see what your harvest weight per meter is now, and compare it to a similar run under your new cob lights.

I could not see any fans stems to pinch off in your flowering area. Have you been deleafing as you go or are they that bare of fans with stems from the initial deleafing? Thanks for the update.

BuddyColas said:

Those buds are looking good! And on the 5th pic in there's significant ambering up of the pistils! I believe you said it's your third run...I think it will be a good one. Be interesting to see what your harvest weight per meter is now, and compare it to a similar run under your new cob lights.

I could not see any fans stems to pinch off in your flowering area. Have you been deleafing as you go or are they that bare of fans with stems from the initial deleafing? Thanks for the update.

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hey Buddy, I don't know why, but I didn't get the notification on your comment.

there was the first deleaf on day 17 flower and the second deleaf on day 28.
didn't touch the plants besides that, but I think the deleaf of day 28 was overkill.
overall I'm disappointed in this grow. I have to many shitty genetics in the room :c
and yeah, the ambering started very early for some phenos.

good you mentioned weight per meter
because now I wonder what is the approximate limit for grams per meter. (for a standart grow, not vertical)
and how did you came up with 1000ppfd if the plan was to use double the wattage for the same set-up as growmau5?


based on this info I can estimate that
283 watts per sq meter (790ppfd) yields around 533 grams (1.8gr/w)
so we can safely say that 800ppfd yields about 500 grams
logic suggests that if I double that I will get ~1600ppfd. (2500w per 5sq meters)
sounds like too much though. anyway I can't expect 1kg per sq meter can I?

Herbal_Essence said:

hey Buddy, I don't know why, but I didn't get the notification on your comment.

there was the first deleaf on day 17 flower and the second deleaf on day 28.
didn't touch the plants besides that, but I think the deleaf of day 28 was overkill.
overall I'm disappointed in this grow. I have to many shitty genetics in the room :c
and yeah, the ambering started very early for some phenos.

good you mentioned weight per meter
because now I wonder what is the approximate limit for grams per meter. (for a standart grow, not vertical)
and how did you came up with 1000ppfd if the plan was to use double the wattage for the same set-up as growmau5?

View attachment 3622270
based on this info I can estimate that
283 watts per meter (790ppfd) yields around 533 grams (1.8gr/w)
so we can safely say that 800ppfd yields about 500 grams
logic suggests that if I double that I will get ~1600ppfd. (2500w per 5sq meters)
sounds like too much though. anyway I can't expect 1kg per sq meter can I?

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I see no reason to think one kg/sq meter isn't possible. It would not be easy to achieve, however.

Thanks for the deleafing info. I’ve tried stripping at 14 days and 21 days, then just let the bud leaves take over and pluck off the big fans…the ones with stems after that as needed.


I should have written down the math on that 1000ppfd…I can’t find it…so disregard that.


So the facts are that he uses 1 cob per sq ft at 700ma for 17 PAR watts and 800ppfd to the canopy. I think GM5 has found a real sweet spot at 1 cob/sq/ft at 700ma for 800ppfd. Then he lets his gardener skills do the rest for 500+ grams per sq/meter. I think 500g a meter is good performance by anyone’s standards.


So your proposed build would go to 2 cobs a sq ft for 1600ppfd. That’s a lot of photons! The photosynthesis curve really starts to flatten out around 1000ppfd. Definitely diminishing returns above 1000 I think.


As for 1kg per sq meter. Even the Three A Light guys aren’t doing that…nor is Grand Master Level either. I’m thinking GM5’s return on wall watts and ppfd is an excellent level of performance to shoot for. I’m not saying 1kg/sqmtr can’t be done, I’m just saying you’re going to have to pass through the 500g/sqmtr to get there.


Whatever your yield on your present grow, I think you will take it to a whole new level when you have those cobs smiling down on the girls! I am watching and enjoying your grow![/QUOTE]

BuddyColas said:

Thanks for the deleafing info. I’ve tried stripping at 14 days and 21 days, then just let the bud leaves take over and pluck off the big fans…the ones with stems after that as needed.


I should have written down the math on that 1000ppfd…I can’t find it…so disregard that.


So the facts are that he uses 1 cob per sq ft at 700ma for 17 PAR watts and 800ppfd to the canopy. I think GM5 has found a real sweet spot at 1 cob/sq/ft at 700ma for 800ppfd. Then he lets his gardener skills do the rest for 500+ grams per sq/meter. I think 500g a meter is good performance by anyone’s standards.


So your proposed build would go to 2 cobs a sq ft for 1600ppfd. That’s a lot of photons! The photosynthesis curve really starts to flatten out around 1000ppfd. Definitely diminishing returns above 1000 I think.


As for 1kg per sq meter. Even the Three A Light guys aren’t doing that…nor is Grand Master Level either. I’m thinking GM5’s return on wall watts and ppfd is an excellent level of performance to shoot for. I’m not saying 1kg/sqmtr can’t be done, I’m just saying you’re going to have to pass through the 500g/sqmtr to get there.


Whatever your yield on your present grow, I think you will take it to a whole new level when you have those cobs smiling down on the girls! I am watching and enjoying your grow!

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[/QUOTE]

thank you for your input, I have done the math in the meantime and it seems that 500w per sq meter will give me 1300ppfd (just as the brightest day at 12:00)
because I will use the B version driver I will be able to dim down all the way to 350ma and adjust for the sweet spot and maybe go full power in mid flower or in the mid of the day for a few hours).

though I'm not sure how to calculate how much ppfd i can expect from 500w 20 cobs @350ma

thank you for your input, I have done the math in the meantime and it seems that 500w per sq meter will give me 1300ppfd (just as the brightest day at 12:00)
because I will use the B version driver I will be able to dim down all the way to 350ma and adjust for the sweet spot and maybe go full power in mid flower or in the mid of the day for a few hours).

though I'm not sure how to calculate how much ppfd i can expect from 500w 20 cobs @350ma[/QUOTE
With a build like that, sheer photon count will never be a limiting factor! I hope you keep posting as you dial it in with the new genetics.

BuddyColas said:

thank you for your input, I have done the math in the meantime and it seems that 500w per sq meter will give me 1300ppfd (just as the brightest day at 12:00)
because I will use the B version driver I will be able to dim down all the way to 350ma and adjust for the sweet spot and maybe go full power in mid flower or in the mid of the day for a few hours).

though I'm not sure how to calculate how much ppfd i can expect from 500w 20 cobs @350ma[/QUOTE
With a build like that, sheer photon count will never be a limiting factor! I hope you keep posting as you dial it in with the new genetics.

Click to expand...

you can totally try and compare it to outside or optimized greenhouse grows.
what kind of ppfd does the sun give? or the greenhouses with supplemental HIDs?
what strains produce 1kg/m^2? 500g/m^2? (in those settings)

also in another direction you may not need all the light your talking about. If you get bigger pots and tune in your grow more you could get 500g per square meter easy. in a 2x4 i got 20 oz dry and cured. 4 3000k vero29s and 2 4000k vero29s running at 1400mA. Cotton Candy and THC bomb


I'm interested in seeing what kinds of yields you pull off with the defoliation. I'm also watching a commercial grower called medicropper try defoliation on youtube. he does some crazy things to get 4 pounds per 1k HPS.

Now I'm going for 5-10 pounds in this room. with 4 times the light.

Thorhax said:

you can totally try and compare it to outside or optimized greenhouse grows.
what kind of ppfd does the sun give? or the greenhouses with supplemental HIDs?
what strains produce 1kg/m^2? 500g/m^2? (in those settings)

also in another direction you may not need all the light your talking about. If you get bigger pots and tune in your grow more you could get 500g per square meter easy. in a 2x4 i got 20 oz dry and cured. 4 3000k vero29s and 2 4000k vero29s running at 1400mA. Cotton Candy and THC bomb
View attachment 3622894View attachment 3622895View attachment 3622896

I'm interested in seeing what kinds of yields you pull off with the defoliation. I'm also watching a commercial grower called medicropper try defoliation on youtube. he does some crazy things to get 4 pounds per 1k HPS.

Now I'm going for 5-10 pounds in this room. with 4 times the light.
View attachment 3622897

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20oz with 300 watts in a 2x4...I'm impressed. Please start a thread. I, and I'm sure others, would like to see how you grow and do that.

BuddyColas said:

Thanks for the deleafing info. I’ve tried stripping at 14 days and 21 days, then just let the bud leaves take over and pluck off the big fans…the ones with stems after that as needed.


I should have written down the math on that 1000ppfd…I can’t find it…so disregard that.


So the facts are that he uses 1 cob per sq ft at 700ma for 17 PAR watts and 800ppfd to the canopy. I think GM5 has found a real sweet spot at 1 cob/sq/ft at 700ma for 800ppfd. Then he lets his gardener skills do the rest for 500+ grams per sq/meter. I think 500g a meter is good performance by anyone’s standards.


So your proposed build would go to 2 cobs a sq ft for 1600ppfd. That’s a lot of photons! The photosynthesis curve really starts to flatten out around 1000ppfd. Definitely diminishing returns above 1000 I think.


As for 1kg per sq meter. Even the Three A Light guys aren’t doing that…nor is Grand Master Level either. I’m thinking GM5’s return on wall watts and ppfd is an excellent level of performance to shoot for. I’m not saying 1kg/sqmtr can’t be done, I’m just saying you’re going to have to pass through the 500g/sqmtr to get there.


Whatever your yield on your present grow, I think you will take it to a whole new level when you have those cobs smiling down on the girls! I am watching and enjoying your grow!

Click to expand...

Are you running a high power COB LED array? Suddenly it seems everyone is building one to run the chips- and the girls- harder than ever.

I went with a large area array, calculated to 824PPfD. One reason I did this was to evaluate heat buildup in a sizeable system. Another is to see just how much I can cram in a little box!

BuddyColas said:

20oz with 300 watts in a 2x4...I'm impressed. Please start a thread. I, and I'm sure others, would like to see how you grow and do that.

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i have a thread going=P https://www.rollitup.org/t/organics-and-leds.844672/page-2#post-12382928

shows my nobody start lol with purple lights and cfls. I use roots organic, with 25% super soil mix at the bottom of 10 gallon smart pots. and nectar of the gods nutes from week 2 of flower till harvest. i train my plants to have 16-20 tops and my canopy is about 12-18 inches deep of thick yummy nugs(.7g nug or heavier is a ok in my book)i make BHO from the larf and trim. and i add a whole lot of air movement. so far I've been getting about an 1 oz of bud for ever gallon of soil (i know its not a good way to measure it) so i may try 20 gallon buckets for the big room. another thing is it took me a long time to find these really good yielding strains that are also really dank.

my best yeilder in terms of bud per m^2 is critical super silver haze. in a 5 gallon smart pot i got 6.4oz dried and cured and it was under an Area 51 SGS-160 form 2 years ago. because of its really tight nodes i can veg this strain for a long time before flower so get a bunch of colas and tops.