Why do some guys wats to still use mono led with cobs?

Add mono's to cobs?

  • Total voters
    116
cdgmoney250

cdgmoney250

Well-Known Member
ttystikk said:
Yes, and more to the point, a good sealed room will stomp the shit out of an outdoor plot in terms of yield and quality simply because the growroom can guarantee ideal growing conditions that outdoor can never match.

At this point, it's about light that's adequate to the task of giving the plants what they need in such an environment as opposed to merely mimicking sunlight.
Click to expand...
That's just not the case at all, and I got the opportunity to see it first hand this summer. Some outdoor conditions are much less than ideal... And still blow indoor grows out of the water.

Greenhouses... Like that sealed room with ideal conditions... Will outperform any sole source artificial light, indoors and out. Yield, frost, plant health were all considerably higher than most indoor operations I've seen. Period.

And this was done by inexperienced growers who are by no means master gardeners

The town I live in has a greenhouse medical facility. Everything medical in Colorado has to be tested for potency and impurities. This"sunlight" grow consistently outperforms indoor operations in THC content and Yield. Even with the same strains. And all organic too!

If you took "like" conditions with two cuts from the same plant... Same nutes, same medium, same size container, light schedule, temp/RH, Co2.. The only difference being the source of light.. Artificial and natural..

You really think you would yield the same inside as "out"?

I think not, and I have seen many examples to base my conclusion on. In real life.
 
FranJan

FranJan

Well-Known Member
Lots of good points being made but heckler's is extremely valid. PWM dimming really shifts whites around and the only thing that is going to tell you what's going on are real world readings like a spectrometer. Or what your plants say :). And you might as well stuff your whole grow room in the sphere too btw. That's why math is only the tool to point the way. Gotta build and grow with the sucker to know. And mixing spectra, monos and whites, like I've been doing for a few years now has basically shown me that all I've done has been some photon chucking :). Some great results and some results just not worth the $$$ but quality wise boosting reds and adding COBs has really got me growing way above my abilities. Still just adding or boosting spectra doesn't guarantee results from what I've seen.

Edit: I meant to say sphere instead of spectrometer so I changed it.
 
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SupraSPL

SupraSPL

Well-Known Member
Another example for smaller diodes, the effect of current and junction temp on XML2 white is just the same as with the COBs, negligible chromaticity shift. These are top quality LEDs and do not shift around like the diode examined in that study so it seems that is nothing to worry about.
XML2 cct shift.png
 
ttystikk

ttystikk

Well-Known Member
PurpleBuz said:
I guess this qualifies as general non-quantifiable experience, for strategically supplementing COBS.
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It's helping me feel more confident about my plans, which amount to scaling up a CXB3590 monoCOB approach to its ultimate logical conclusion.

It's interesting to me that people report more positive results from adding reds to COB LED than blues.
 
Shredderthirty

Shredderthirty

Well-Known Member
yeah its something about the cobs already having enough blue and the deep red being all they are missing out on...660nm i think
 
EfficientWatt

EfficientWatt

Well-Known Member
There is a lot of inefficient use of power from Daylight, a lot of high energy photons which are not very productive

660nm is very highly absorbed, and has a lot of photons per Joul or W, because they are low energy photons. Plants don't care how much energy a photon they catch has.
They count in photons.

If I chuck a beer at you with a lot of power, it will feel heavier the instant you catch it. Yet, there won't be more beer inside it than if I just handed it to you ...
Energy efficiency is what it's about.

cdgmoney250 said:
That's just not the case at all, and I got the opportunity to see it first hand this summer. Some outdoor conditions are much less than ideal... And still blow indoor grows out of the water.

Greenhouses... Like that sealed room with ideal conditions... Will outperform any sole source artificial light, indoors and out. Yield, frost, plant health were all considerably higher than most indoor operations I've seen. Period.

And this was done by inexperienced growers who are by no means master gardeners

The town I live in has a greenhouse medical facility. Everything medical in Colorado has to be tested for potency and impurities. This"sunlight" grow consistently outperforms indoor operations in THC content and Yield. Even with the same strains. And all organic too!

If you took "like" conditions with two cuts from the same plant... Same nutes, same medium, same size container, light schedule, temp/RH, Co2.. The only difference being the source of light.. Artificial and natural..

You really think you would yield the same inside as "out"?

I think not, and I have seen many examples to base my conclusion on. In real life.
Click to expand...

Compare apples to apples : If you were to use the same total amount of radiant power from the sun, and the same total amount of radiant power from a HPS / CXB, you would have much more PAR with artificial light.

Therefore => the best indoor grow lamp should not try to replicate fully the sun spectra.

The reason you are blinded, is that you don't have to pay the electricity to run that .imaginary HID, because the sun is free.

If the radiant power we get from the sun could be reproduced with a 40% efficient HID ; You would require an estimated 3000W per square meter ... does that sound like a high GPW lamp ???

Do you regularly get 3KG to 4.5 KG of dry bud per square meter outdoors ? ;)

I didn't think so ...

:peace:
 
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Positivity

Positivity

Well-Known Member
tweak
twēk/
verb
  1. 1.
    twist or pull (something) sharply.
    "he tweaked the boy's ear"
    synonyms:pull, jerk, tug, twist, twitch, pinch, squeeze
    "she tweaked his nose"
  2. 2.
    informal
    improve (a mechanism or system) by making fine adjustments to it.
    "engineers tweak the car's operating systems during the race"
    synonyms:adjust, modify, alter, change, adapt;
    refine
    "the product can be tweaked to suit your needs"
noun
  1. 1.
    a sharp twist or pull.
    synonyms:pull, jerk, tug, twist, pinch, twitch, squeeze
    "he gave her hair a tweak"
  2. 2.
    informal
    a fine adjustment to a mechanism or system.
    synonyms:adjustment, modification, alteration, change;
    refinement
    "a few minor tweaks were required"
 
littlejacob

littlejacob

Well-Known Member
Positivity said:
tweak
twēk/
verb
  1. 1.
    twist or pull (something) sharply.
    "he tweaked the boy's ear"
    synonyms:pull, jerk, tug, twist, twitch, pinch, squeeze
    "she tweaked his nose"
  2. 2.
    informal
    improve (a mechanism or system) by making fine adjustments to it.
    "engineers tweak the car's operating systems during the race"
    synonyms:adjust, modify, alter, change, adapt;
    refine
    "the product can be tweaked to suit your needs"
noun
  1. 1.
    a sharp twist or pull.
    synonyms:pull, jerk, tug, twist, pinch, twitch, squeeze
    "he gave her hair a tweak"
  2. 2.
    informal
    a fine adjustment to a mechanism or system.
    synonyms:adjustment, modification, alteration, change;
    refinement
    "a few minor tweaks were required"
Click to expand...
Bonjour
I didn't ask anything!...Do I?...lol
Thanks for the English lesson!
Ho! Look! He tweak the pig tail...no crazy french guy!
CU
 
Waiks

Waiks

Well-Known Member
Great discussion here!
I have an ideal space for a side by side comparison.
36"W × 16"L split in half
12 vero 10s @350ma, 6- 3000k, 6- 4000k divided and spaced evenly through out the two 18"W x 16"L spaces.

I have been 80% positive about supplementing the whole space with monochromes. Now that this thread has come up, might as well cut my costs a little and only do half for now :)

I would like your guys' input on what diodes/nm I should add to one side to create an 'ideal' ratio. The test will feature cuts from identical plants in identical organic soil. There will be a wall in between to keep the photons or whatever term applies here separated. Progress will be posted with whatever details ya'll would like.

Pretty much ready to go...just gotta order some monochromes and put up a wall. The clones have recently rooted, so the timing is perfect :)

What shall we supplement with?
 
P

PurpleBuz

Well-Known Member
Waiks said:
Great discussion here!
I have an ideal space for a side by side comparison.
36"W × 16"L split in half
12 vero 10s @350ma, 6- 3000k, 6- 4000k divided and spaced evenly through out the two 18"W x 16"L spaces.

I have been 80% positive about supplementing the whole space with monochromes. Now that this thread has come up, might as well cut my costs a little and only do half for now :)

I would like your guys' input on what diodes/nm I should add to one side to create an 'ideal' ratio. The test will feature cuts from identical plants in identical organic soil. There will be a wall in between to keep the photons or whatever term applies here separated. Progress will be posted with whatever details ya'll would like.

Pretty much ready to go...just gotta order some monochromes and put up a wall. The clones have recently rooted, so the timing is perfect :)

What shall we supplement with?
Click to expand...
UVAs (400 - 420nm) offset with deep reds, skipping the royal blues since you have 4K cobs already mixed in.
 
Positivity

Positivity

Well-Known Member
littlejacob said:
Bonjour
I didn't ask anything!...Do I?...lol
Thanks for the English lesson!
Ho! Look! He tweak the pig tail...no crazy french guy!
CU
Click to expand...


I was just playing. The whole definition made me laugh when I read it.
Pretty simple really, do what you like.
There's always gonna be some who want to tinker and tweak. Monos are great for that.
 
P

PurpleBuz

Well-Known Member
Greengenes707 said:
Cree uses a sphere and spectroradiometer...you really think they didn't?
Click to expand...
no I did not :) my point was that once the raw data is converted into the lumen scale data is lost you cannot get it back. seems like small amounts especially with the correction factors applied, but every time data is lost the deviation increases significantly and you cannot get it back without actually measuring.

would be much simpler if we could finally get rid of lumen biasing and cree would just publish straight radiometric data, but that's not how the evolved standards work currently.

projections on estimations ....
 
REALSTYLES

REALSTYLES

Well-Known Member
Everyone who is talking about adding mono's to their COB lights now it's time to see recent pics or else it didn't happen. We need to know what was the cost to add or make that light.
 
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