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Wisher2

Wisher2

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sixstring2112 said:
is that your first run on the strain?just wondering because the math comes in very low compared to 600 hps,which would be less than 1/2 gram per watt. i do want to try making fixture or 2 at higher currents like 1750 or 2100 when and if i can get my hands on some larger pin sinks.
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thats .8 gram per watt with the 310w led with a Platinum GSCx Blue Dream.....really low yielding strain
with a 400w hps in that space I got .4 gram per watt
the thing is I dont measure gpw.....to me it's nonsense
a better measurement is grams per sqft
I also like comparing watt for watt
so I look at what I could do with 400hps in a certain sqft....then compare to an led fixture that is 90 watts less and I doubled the gpw...
but again IMO gpw isnt a very good measurement
for me...I really like to maximize the space that I am growing
if I add 2 more cobs that will push my watts to 450
judging by what I just netted from 310
2 cobs will increase my yield from 253 g per sqft to 334 g per sqft
essentially netting me 166 more grams per sqft with only 50 more watts then a 400hps
which in that space only nets me 14 g per sqft essentially .42 gpw....remember this is a super low yielding cookie strain
I am sure if I grew a commercial strain like Big Bud....I would be destroying my space....but I grow connisuer strains which some are very low yielding....but the quality and effects....for me.....are what I am after with the strains I grow
 
sixstring2112

sixstring2112

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Wisher2 said:
thats .8 gram per watt with the 310w led with a Platinum GSCx Blue Dream.....really low yielding strain
with a 400w hps in that space I got .4 gram per watt
the thing is I dont measure gpw.....to me it's nonsense
a better measurement is grams per sqft
I also like comparing watt for watt
so I look at what I could do with 400hps in a certain sqft....then compare to an led fixture that is 90 watts less and I doubled the gpw...
but again IMO gpw isnt a very good measurement
for me...I really like to maximize the space that I am growing
if I add 2 more cobs that will push my watts to 450
judging by what I just netted from 310
2 cobs will increase my yield from 253 g per sqft to 334 g per sqft
essentially netting me 166 more grams per sqft with only 50 more watts then a 400hps
which in that space only nets me 14 g per sqft essentially .42 gpw....remember this is a super low yielding cookie strain
I am sure if I grew a commercial strain like Big Bud....I would be destroying my space....but I grow connisuer strains which some are very low yielding....but the quality and effects....for me.....are what I am after with the strains I grow
Click to expand...
Yeah i only made mention of yields because you made reference to a 600hps and your room size.i get close to or over a pound with 600w lamps running multiple strains.cookies may look low yielding to some but most of them will surprise you on the scale because of bud density; )
No doubt 400w is inefficient as a stand alone lamp.
 
Wisher2

Wisher2

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sixstring2112 said:
Yeah i only made mention of yields because you made reference to a 600hps and your room size.i get close to or over a pound with 600w lamps running multiple strains.cookies may look low yielding to some but most of them will surprise you on the scale because of bud density; )
No doubt 400w is inefficient as a stand alone lamp.
Click to expand...
what I was saying is 6 3590's @2.1a should fall somewhere between a 600 and 1k when it comes to par in my grow space
my cookies yields nothing.....my affie strain yields about 10zips under a 400 in my 2x4 space
so under a 600 my affies would probably be even more dense.....
IME even between same strain phenos or crosses there is always a variable outcome in yield.....especially with cookie crosses
yes they are dense flowers but extremely small compared to standard commercial flowers
 
ÉsÇ420PoT™

ÉsÇ420PoT™

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i hope no one tears me a new one on this, as there are so many brands and I'm not to familiar with growing with LEDs. So any help is greatly appreciated.

So I plan on getting a 10x10 set up going. Was thinking of going the LED route. Now from what I've read, it's measured in wattage as opposed to lumens like I have previously with HPS. I'm curious to see what types, brands, and wattages you guys would likely recommend? If it's any help as to what I'm looking for, 5000 lumens per sq.ft.
Thanks guys
 
Wisher2

Wisher2

Well-Known Member
ÉsÇ420PoT™ said:
i hope no one tears me a new one on this, as there are so many brands and I'm not to familiar with growing with LEDs. So any help is greatly appreciated.

So I plan on getting a 10x10 set up going. Was thinking of going the LED route. Now from what I've read, it's measured in wattage as opposed to lumens like I have previously with HPS. I'm curious to see what types, brands, and wattages you guys would likely recommend? If it's any help as to what I'm looking for, 5000 lumens per sq.ft.
Thanks guys
Click to expand...
there is alot of information on this forum.....if you read through this thread you may find what you are looking for as those topics have been covered many times
as well...in LED world lumens arent as important......par #'s and ppf/ppfd (photometric photon flux/ density) how many photons the light emmits to the canopy.....which is more important then lumens per se......
but simple answer...about 50watts per sqft with COB LED's
 
Stealthstyle

Stealthstyle

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Can anyone help me out with how much light my cobs are putting out? my area is 34 inch by 18 inch wide about 1.5 metres in height.
Running 4 cree cxb3070's at 1400 ma... just not sure about distance to the plantes yet as i fried one seedling but that may have been from outdated nutes (low ec)
 
JorgeGonzales

JorgeGonzales

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Stealthstyle said:
Can anyone help me out with how much light my cobs are putting out? my area is 34 inch by 18 inch wide about 1.5 metres in height.
Running 4 cree cxb3070's at 1400 ma... just not sure about distance to the plantes yet as i fried one seedling but that may have been from outdated nutes (low ec)
Click to expand...
Unless something has precipitated out, I've never had synthetic nutes go noticeably bad.

Anyway, SupraSPL's spreadsheets tell you all you need to know. Umol/s/W * dissW * num of cobs = PPF divided by area in sq meters = PPFD. It's a lot of light.
 
Stealthstyle

Stealthstyle

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they were organic seedling nutes a few years old....i also added some rooting powder to speed up the roots. thanks for the reply.
 
mauricem00

mauricem00

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Stealthstyle said:
Can anyone help me out with how much light my cobs are putting out? my area is 34 inch by 18 inch wide about 1.5 metres in height.
Running 4 cree cxb3070's at 1400 ma... just not sure about distance to the plantes yet as i fried one seedling but that may have been from outdated nutes (low ec)
Click to expand...
5800 lumens per sq foot seems like a lot with seedlings and LEDs tend to focus their light so they are much brighter directly beneath the diodes. is there anyway you can reduce your drive current until your plants are larger?
 
Stealthstyle

Stealthstyle

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yes i have a veg box with cfls. i was just impatient. i dont have a dimmer. Thanks for the response.
 
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