Your yield on a HLG550?

wietefras said:

Nonsense, 1.5g/W and up is easily done with good quality led fixtures. And yes I also only weigh the product that I can sell. Although I would mention the fluff weights too. Especially when doing experiments to lower the ratio of primo/fluf

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Some of that flarf at the bottom is way frostier than the tops and more Terps. I think all the good stuff gets to the lower buds before the top buds and they get the prime juice
Nobody's pulling over 1.5 with the regular grow techniques. Let that go and furthermore it makes me sick when any LED company premium or not says on their website that you can expect 1.5 to 2 g/W w/ there silly light.

OneHitDone said:

Problem here is that your "Goldilocks Zone" falls from 500umoles to 250umols in what - 6"??
That's the little dick led syndrome many speak of. Shows that you can have all the ppf you want spread around the top of your growing space but doesn't mean your getting strong enough light down low to produce anything of good quality

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You're obviously not understanding what is going on in the diagrams, or you didnt look at his full post.

The yellow line is your goldilocks zone, where the PPFD is within a reasonable level.Your canopy would reside somewhere in the middle.



As you add more emitters and split the power, the goldilocks zone gets bigger as you can get closer to the emitters without sacrificing the PPFD down the bottom..




So you can have your plants much closer to the lights and the light will still penetrate as far down as it did when you had less, stronger emitters. AKA - Light penetration

OneHitDone said:

falls from 500umoles to 250umols in what - 6"??

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Try looking at the legend on the LEFT showing the light levels in the colored areas. Its not 6 inches - the numbers on the right are just the comparative light levels of a single emitter.

The light gray is 1000 and down to the green zone is 375 - that's about 2.5 feet.

since1991 said:

Despite what forum growers claim...3 pounds per 1000 watt is very very difficult. Much easier with double ended 1000 watt ups but if it's your only lamp...its not that easy as well. And with single ended 1000 watt hps...nope...

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I'm talking about Gavita Pro 1000W DE lights, but even with a single SE HPS in a small tent I didn't have much trouble getting around 1 g/W. Using an undercurrent system and DIY automated gadgets to keep things in check it really is easy.

As skroomd said, there was a HPS fan guy here (trippy something) and he claims it's easy to get 4 pounds from a single 1000W bulb, but he can't do the same with led. Now that sounds suspect to me.

I've seen pro HPS growers get well over 1g/W though. I really can't belief it's that difficult. Only people who don't get it themselves say that.

Although I see plenty of grows where people have flat white walls, or even worse, walkways around their grow. Easy loss of 20% light. Or they just sort of guess how much to water. Easy loss of 20% again. So yeah I can understand in those cases it's going to be hard to get it, but it's all an easy fix.

Then with a single 1000W HPS DE you get about 1.4umol/s/W on the plants taken from Gavita's own measurements of such a setup. With leds (COBs or strips) you can produce up to 2.6umol/s/W these days. Take off 10% wall losses and you end up 2.3umol/s/W on the plants. Then the leds give you less hot spots, and much better penetration which improves the situation even further. There really is no discussion that such massive efficacy differences will have a huge impact on g/W.

From my own grows I noticed that if I account for the amount of photons, I got similar g/(umol/s) figures with HPS and leds. Slightly higher with led. So it's not the spectrum or whatever, the amount of light is what grows the plants. Get the same amount of light from less watts and you have a higher g/W.

skoomd said:

I really disagree with your idea of how much diffusion you can have has a limit. Because it doesnt matter if it's 1 cob sq/ft or 100 cobs sq/ft, you still get increased canopy penetration via more angles of light to get through the foliage.

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The problem is that that's just a belief or hypothesis at best. I've seen people try this with side-by-side grows and it didn't matter.

Going from one light source per 2m2 to 1 per sqft. Sure that's a clear and measurable difference of a few percent. Going from 1 per sqft and then increasing even further. There was no further increase to be seen.

wietefras said:

The problem is that that's just a belief or hypothesis at best. I've seen people try this with side-by-side grows and it didn't matter.

Going from one light source per 2m2 to 1 per sqft. Sure that's a clear and measurable difference of a few percent. Going from 1 per sqft and then increasing even further. There was no further increase to be seen.

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I still think you guys are mistaking "coverage" for "Penetration". The hid guys say "Penetration" they mean hang the light in one position and you can grow anywhere in the room as if the sun was overhead. Horse power of the lamp for growth at distance from the fixture.
Not that light is coming from many angels.
It a light comes from many angles and lacks intensity it ain't gonna do the same as the high powered lamp, unless your talking Scrog..

That is why I recommend the double row strips. They can put down a fat amount of light in a quite deep area.

Im testing a gavita 750 (850wmax) 1 light

In a 7.5x6 area way up high in the center

Just to see what it can do im hoping for way over 2 units but this run isnt even on point

When i feel like im on point next run hopefully
Will be even better

I used to get close to 2 lbs with a 1000w light single.ended aircooled digi ballast in a 5x5x5 box


The grow is far from my best work but im pretty impressed by that little light so far.

This is the cherry popin run. Next run ill get serious and see what i can wring out of it

wietefras said:

3 pounds from a 1000W HPS DE in a 5x5 tent isn't that weird. That's pretty standard isn't it? Although I must agree that my cola's of that size grow did indeed look a lot bigger.

I would generally get 3 pounds from a Gavita 1000W DE. Even though usually some things would go wrong along the way. I'm glad I transferred to COB lights though. Had much less heat issues (or in fact issues in general) with those and yields went way up.

When comparing HPS to led buds, I feel that led buds do end up a bit more compact. So they weighed more than my HPS yields even though they did look smaller to me before I weighed it up.

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Older thread but this is exactly what happened to me with a #hlg600. Top colas were much smaller but very dense compared to 6the 2 previous grows that flowered under hps

To anyone in progress with a led /qb style grow, do not despair if your colas isnt what they used to be at first look. Count your grams after dry and cure as 1 pound of led bud can look half the volume of a hps grow, even if the hps was all dense. The IR in hps increase water content which can still seem dense with squish test.

Rocket Soul said:

To anyone in progress with a led /qb style grow, do not despair if your colas isnt what they used to be at first look. Count your grams after dry and cure as 1 pound of led bud can look half the volume of a hps grow, even if the hps was all dense. The IR in hps increase water content which can still seem dense with squish test.

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Be careful talking logical around here bro, you know how they get lol

Just trying to reassure anyone in doubt, the first grow i kitted with sammie boards was unhapppy all the way until the weigh in. But i forget we are here and not there

I look at this way, if I run 6 plants under 2 x 600 HPS in a 5 x 5 and veg for 30 days, the best that I can pull is 26 to 28 zips, but if I do the same thing running 2 x 320 @ 250 watts each and pull 32 to 36 zips, then led tech clearly wins. Yes, I know I will have to do more trimming cause led(s) creates smaller tops, but I have constantly seen led(s) do something that I have never seen MH/HPS do very well, and that is... the led(s) have the ability to pull a lot of those side branches under the canopy straight to the top, which makes many more viable tops, and yeah most of those are small tops, but even small tops are way better than having all those side branches under the canopy never develop into anything substantial cause the MH/HPS tech simply cannot push those side branches under the canopy, to the top like any decent LED(s) seem to be able do, and constantly! But don't think I am dissing MH/HPS tech, cause they have their place, as they simple work, just set them and forget them and you will get great results, but for the home grower, decent led(s) give the home grower a very economical way to grow their own medicine using less than half the energy as a MH/HPS lamp.

My best reported yield is 2.3g/W under 1152 LM561C driven by only a 320W driver from Mean Well.

That is just over 2 pounds per light in old speak.

489g off 300w of QB. Enlarged 550. 3k, 90cri.

this aged well

hybridway2 said:

Nobody's pulling over 1.5 with the regular grow techniques. Let that go and furthermore it makes me sick when any LED company premium or not says on their website that you can expect 1.5

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hybridway2 said:

489g off 300w of QB.

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hybridway2 said:

489g off 300w of QB. Enlarged 550. 3k, 90cri.

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Space? How do you rate 3k 90cri compared to your amares?

Our grow had good results with 2700k 90cri, i also saw the high lights/prawn board beat out various red/far red/uv enhanced hlg qbs in 300k 80cri. The prawn board is kinda like enhanced white but all in one diode

lukio said:

this aged well



...

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I know, i know. Hahaha! I saw that n could not believe i said it.
Now I'm Finally doin it.
Oh my, Stephen, all QB & led users.
Please excuse my above post. And any others stating 1.5 gpw+ is hard to do consistent.
Its really not. With no sacrifices to g/sq' either. On the contrary.
So, yup. I was wronggggggg......

Rocket Soul said:

Space? How do you rate 3k 90cri compared to your amares?

Our grow had good results with 2700k 90cri, i also saw the high lights/prawn board beat out various red/far red/uv enhanced hlg qbs in 300k 80cri. The prawn board is kinda like enhanced white but all in one diode

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I liked it for once. Took me some time to do it any justice. I think that just goes with led in general for me. Don't really wanna play the comparison game because i feel it upsets people or just makes me look like a shill.
Differences in Colors, bud shape, & finishing time come to mind though.
Did get some nice Donkey Dicks from it.
Got a good stretch & had even altered the spectrum some by adding a 100w, 6K Horizon veg light in the middle.
Its a helluva light.
I really think HLG should consider this big QB unit as an option for the mkt.
Yes, i like the Prawn Boards too, as much as i can w/o having tried them.

@hybridway2

pahaha! its all good, the progress must be nice. i haven't even weighed my last couple

your last round looked great. did you clone those?