How does efficiency effect a grow?

astonehead said:

Sweet but shouldn’t you make your own post mate? Your light has nothing to do with my question lol

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my bad for supporting thread hijacking

whatever thread is made doesnt belong in LED section anyway

Im going to build an led set up after i have a baseline of what this light can do in my 8x8(ish)
Room

The light impresses me so far for only runnin 600w not even the whole time lol.

But leds are also going to be a part of my setup soon

But i have the see what this light can do by itself first.

We'll see how many units i can get in 2 months

CobKits said:

everything looks great but can you push em together and lose that space in the middle? just about every light throws down maximum ppf right underneath the bulb

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I just flipped and will hopefully fill the whole space when done

Lastime i filled the whole room up with my old setup

astonehead said:

Sweet but shouldn’t you make your own post mate? Your light has nothing to do with my question lol

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Sorry bud

But isnt 600 w in a 8x8 efficient ?

Sorry i didnt pay attention to the led forum

I just saw efficiency affects grows and i figured i was being pretty efficient lol

My bad man

Cold$moke said:

Sorry bud

But isnt 600 w in a 8x8 efficient ?

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at 10W/SF you''ll yield smokeable but loose, nonsellable product

CobKits said:

at 10W/SF you''ll yield smokeable but loose, nonsellable product

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This is what im testing now

By the looks of the veg though im not too worried but only time will tell .

You woul think if it was hungry for light my node spacing would show it ... they are pretty tight .

But proof will be in the pudding at the end.
Not saying you are wrong at all cause ive been growing for 15 years.

My canopies are pretty thin vertically if you look at it from the side but when they should just about fill the room hopefully filled with all tops like before

i dont like to grow larf either but i love concentrates
So if i get a bunch of fluff thats where it will go

yield per watt will be high for sure if you fill the space

CobKits said:

also using cobs with reflectors right next to boards makes zero sense in my mind

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Isn't that the only case where it does make sense? The only scenario where reflectors have a tiny benefit is when you want to increase the distance between COBs and plants.

Boards need to hang very high to get some semblance of a uniform light distribution in a square tent. Adding COBs can help reduce that problem somewhat, but it still needs to hang higher than usual.

First rule of good efficient yields: Never light the floor. I would go with the rearranging the stuff together in the middle idea.

For HPS it is
400W in 3x3
600W in 4x4
1000W in 5x5 or 6x4

ANC said:

First rule of good efficient yields: Never light the floor. I would go with the rearranging the stuff together in the middle idea.

For HPS it is
400W in 3x3
600W in 4x4
1000W in 5x5 or 6x4

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I agree for old school lights

A gavita shouldnt be in the same class

Stick a gavita in a 4x4 and see what happens

based on the relative efficiency difference between an old hps and a double ended, your 4x4 would become a 4.5 x 4.5 and 5x5 would be a 5.7 x 5.7 (at same light intensity)

thats based on the commonly cited 1.7 vs 1.3 umol/J

Sorry i would never stick a gavita in a 4.5x4.5 unless i wanted bleached plants.

4x 6 would be the minmum for me after using the light and NOT IN a little tent lol

Not saying your numbers are wrong but real world applications not possible without high . ceilings and or ac if you dont give this ting some height it will bleach the shit outa plants lol

And i grew for years in a 5x5x5 box with a 1000w sinlge ender digi ballast in an air cooled hood.

It may be low on watts but she will burn stuff quite easily if not respected lol

I have high ceilings made for the lights

Cold$moke said:

Not saying your numbers are wrong but real world applications not possible without high . ceilings and or ac if you dont give this ting some height it will bleach the shit outa plants lol

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yeah gavita reflectors kinda suck for most smaller applications. Boss or ACDE is much better coverage

ive used 2 x 1000 DEs in a 5x9 tent and it worked great. good yields no bleaching. 36" off canopy

Nice any pics?

Did you have ac at all?

im not sure how other brands stack up against the gavita

Im about 4 feet up from the tops and if my circ fans are off my leaf tips start to show signs of heat stress

Either way ill make a thread so i dont keep responding to stuff on this thread .

It will be when the run is close to being done though as i hate slow weekly updates lol
Id rather just show the results

CobKits said:

yeah gavita reflectors kinda suck for most smaller applications. Boss or ACDE is much better coverage

ive used 2 x 1000 DEs in a 5x9 tent and it worked great. good yields no bleaching. 36" off canopy

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What was your yeild? So i know if im doing good with one

Feel free to pm for the threads sake

Cold$moke said:

im not sure how other brands stack up against the gavita

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bulbs are pretty much the same reflectors are much different

https://growershouse.com/blog/best-indoor-grow-light-test/

anyway done thread hijacking

sorry @astonehead

Just some thoughts:
Seems like you have plenty of wattage to top light a 4x4 to f*ck. Maybe switch some of the boards to side lighting, on low wattage so you can bring them in close, in order to build a deeper cannopy?

Enviroment: make sure its on point so the plants drink/eat properly by transpiring harder. 82°F / humidity according to VPD as long as you can control so humdity doesnt spike/temp drop at lights out. And plenty of airflow, especially at the bottom.

Is your strain amenable to some defoliation? This could bring more light on the bud, but defo is always controversial. Some growers/strains like it so.e dont.

Just some thoughts

It is not watts you should focus on but ppfd at the canopy. We can all advice, but a meter will answer all your questions.

My observations: COB's focus higher lumens/watt in a smaller area needing to be farther away from canopy. PCB's focus a more distributed lumens/watt.

Recommendations: Move thee PCB's closer to the canopy and let the COB's be further away. Separate the two from one fixture to two fixtures and you will be able to control your canopy ppfd easier.

Mixing the two formats is not bad, just use a meter to get them on the same level of production.

VegasWinner said:

My observations: COB's focus higher lumens/watt in a smaller area needing to be farther away from canopy. PCB's focus a more distributed lumens/watt.

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That is simply not true. Boards are basically a replacement for 4 COBs in a small rectangle. Which means you really need to hang boards higher to get properly uniform lighting. HLG advises to hang QB's at 18". That's twice as high as you'd generally hang a COB fixture.