Grandmaster Level - HLG Quantum Boards vs 1000w HPS side by side (youtube)

Stephenj37826 said:

Actually an Ivy league college is going to do just that in growth chambers. We talked to them Friday. Very interested to see where it goes.

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Every grow has some problems, but the latest HPS vs LED grow was one problem after another. Just stating facts.


The sulpher burners were left on to long on the LED side.

The folier spraying was botched.

The LED side over-watered.

It took weeks just to get a PAR meter to adjust LED light heights.

It took many weeks to get the much need dehumidifiers for the LED side.

The PH meter was not calibrated for weeks? Really?


Every week was a new problem and another apology. High marks for honesty, but unless GML gets back into the test garden himself, I think the chances of a “near perfect run” are pretty low.


So I look forward to some tests of your lights from the ivy league colleges.

OLD MOTHER SATIVA said:

>>white light rocks as far as i can see [from a couple years experience]
...screwing around with nutes all the time doesn't help bro..
regardless hybrid you are a cool guy

quote
"Who knows. Maybe it was a bad batch. Maybe they got damaged in shipping or weren't set correctly. Many things could be the reason

>not this..height, temp,nutes..cosmic fallout..but not either of those..

Quote
"which is why if he can find some researchers close to him he can address them fairly quickly."

>>i have to honestly ask you ..can these book learned unievrsity people even grow anything?


as for the hps vs..qb.......isn't this second cycle grown good enough?

by" next round" you mean this current one that was getting finished huh..?

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I was being nice. If I mentioned the things you did, I would be accused of a bunch of things so I left that open ended.

As for growing anything, yeah researchers can grow. If they are going into the horticultural industry it is somewhat of a prerequisite.

BuddyColas said:

I think the chances of a “near perfect run” are pretty low.

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It's like that in every garden. I don't know how many flawless runs I've had, but more times then not its always something.
Not sure why all the excuses. Pretty fucking sad really.

hybridway2 said:

For sure. I haven't done much to help the situation by not nailing down a line by now. Had a whole yr w/ double the plant count to figure it out. By my going back to work I also couldn't put in the time I used to.
Idk why but I just have a tough time under the all white.
I've sunk my best veg plants into all white leds for flower & each time they took the worst beating. Sometimes Not making it to the end. I'm starting to think lower intensity when using all white along w/ nutrient adjustments.
IDK but have been side by siding in a rough grow environment w/ all plants getting the same treatment & notice myself having a harder time under 800umol+ white led.

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hi bro

i do not under stand why they should get beat up..
one of the reasons i like these leds is that they don't get beat up
and seem to be happy green all the way through flower..
pm is my only problem..i guess maybe too much light..
i sure do not go for 800+umols..and seldom ever use a meter since my first led technoflurry
..but maybe its nutes..calcium/magnesium..

disclaimer: i r no expert

i wish you the best

Yeah, I will start leaching them earlier next run when I do big plants again. These girls of mine are still as green as they were in veg. And they have been drinking distilled water for a while now.
My girls are having their last hours of precious light. They will get the chop tomorrow morning, day 52, perfect to the day as always.

"hybridway2, post: ]Prob because they Hps plants were allot easier to care for. I believe it's totally relevant & coinsides w/ my experience thus far.

>nah imho they are not ..led plants are way easier to care for..

the hps is this freakin sizzling hot orb

blasting heat at em

ANC said:

Yeah, I will start leaching them earlier next run when I do big plants again. These girls of mine are still as green as they were in veg. And they have been drinking distilled water for a while now.
My girls are having their last hours of precious light. They will get the chop tomorrow morning, day 52, perfect to the day as always.

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Get a good dry and cure then gloat to the world!

It makes sense that for those who are accustomed to growing under HPS, switching to LED could pose some challenges. The growing conditions are notably different, so what else should we expect? I suspect that the reverse would also be true, however it's quite rare to see someone that has grown only under white light LED make the switch to HID. In fact, I can't recall seeing an example of that (though I'm sure it has happened). I don't believe that OP's results indicate that it's easier to grow under HPS, but rather that it's easier to grow under HPS when your methods are HPS-optimized. We have so many examples here on the forum that show growers easily crushing it under COBs/QBs/strips.

Humple said:

It makes sense that for those who are accustomed to growing under HPS, switching to LED could pose some challenges. The growing conditions are notably different, so what else should we expect? I suspect that the reverse would also be true, however it's quite rare to see someone that has grown only under white light LED make the switch to HID. In fact, I can't recall seeing an example of that (though I'm sure it has happened). I don't believe that OP's results indicate that it's easier to grow under HPS, but rather that it's easier to grow under HPS when your methods are HPS-optimized. We have so many examples here on the forum that show growers easily crushing it under COBs/QBs/strips.

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What planet are you people on to think that a light source that requires "notably different" condition is a good thing?
Led should be able to be mixed right in with HID lighting if you can get past the "efficiency" bs and realize the spectrum deficiency that is causing the problems.
Think SUN, we want to mimic that as closely as possible even beyond the "Par" range...

OneHitDone said:

What planet are you people on to think that a light source that requires "notably different" condition is a good thing?
Led should be able to be mixed right in with HID lighting if you can get past the "efficiency" bs and realize the spectrum deficiency that is causing the problems.
Think SUN, we want to mimic that as closely as possible even beyond the "Par" range...

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The part I liked about Humble's post is the part about people who are using white light LED and not switching back.
I mean I know last month you thought I was an LED fan boy but that is not true. I have only used HID and have been considering LED for a veg tent. I'd still flower with hps.
I have to wonder how many growers were disappointed with white light LED and switched back, it's a good point.

OneHitDone said:

What planet are you people on to think that a light source that requires "notably different" condition is a good thing?
Led should be able to be mixed right in with HID lighting if you can get past the "efficiency" bs and realize the spectrum deficiency that is causing the problems.
Think SUN, we want to mimic that as closely as possible even beyond the "Par" range...

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And what planet are you on to think a massive space heater lamp is good for growing plants


Been growing under LEDs for 3 years now and I would never go back to HPS. Having a heater in my grow rooms is not conductive to good quality bud. Just my experience! And I know it isnt everyone else's experience.

skoomd said:

And what planet are you on to think a massive space heater lamp is good for growing plants


Been growing under LEDs for 3 years now and I would never go back to HPS. Having a heater in my grow rooms is not conductive to good quality bud. Just my experience! And I know it isnt everyone else's experience.

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Heat is not the problem that people keep trying to make it out to be. We all have seen through the "No heat" led claim.

We are talking spectrum, why is led struggling under the exact same environmental conditions as HID? - SPECTRUM
All this "Par" talk and "McCree" is getting nauseating.
Many know that light outside of "par" plays a huge role in plant development and why even skoomd can't meet my lettuce challenge with his QB's. Show us some plants other than cannabis under those QB's bro, chicken??

OneHitDone said:

Heat is not the problem that people keep trying to make it out to be. We all have seen through the "No heat" led claim.

We are talking spectrum, why is led struggling under the exact same environmental conditions as HID? - SPECTRUM
All this "Par" talk and "McCree" is getting nauseating.
Many know that light outside of "par" plays a huge role in plant development and why even skoomd can't meet my lettuce challenge with his QB's. Show us some plants other than cannabis under those QB's bro, chicken??

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No I do see your point. And interestingly ive grown veggies under blurples and while they didnt look like they would under the sun, they grew just fine. That's with peppers though, not a leafy green. There are lots of microgreen grow facilities popping up in people's basements and shit and they grow exclusively under LEDs, and often white leds from what ive seen. They grow great. They need to use LEDs because T5s are too inefficient to make it cost effective, and they grow on shelves so they have really low clearance to work with.

But I do recognize the important of wavelengths outside of PAR. And their effects on vegetative growth.

It's not as big of a deal as hortilux will make you believe though with their stupid new ceramic HPS bulb that has 50%+ of the spectrum in the IR range.....


edit: important to note that HPS causes morphogenic issues as well. all of the IR and far red in the spectrum causes unnatural elongation and fluffier buds. It needs to be balanced with more blue

OneHitDone said:

What planet are you people on to think that a light source that requires "notably different" condition is a good thing?
Led should be able to be mixed right in with HID lighting if you can get past the "efficiency" bs and realize the spectrum deficiency that is causing the problems.
Think SUN, we want to mimic that as closely as possible even beyond the "Par" range...

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You didn't evolve from fluoros to hid? Their was a learning/ condition curve too ...... if you think efficiency is "bs" then you should just stick to cool tubes, oh wait; )

Gml did a bang up job in his comparison run at that scale, not easy.....

Btw slingingFARTS is the asshole that singlehandedly closed gg's awesome thread, has a hard on for him===petty shit

OneHitDone said:

Heat is not the problem that people keep trying to make it out to be. We all have seen through the "No heat" led claim.

We are talking spectrum, why is led struggling under the exact same environmental conditions as HID? - SPECTRUM
All this "Par" talk and "McCree" is getting nauseating.
Many know that light outside of "par" plays a huge role in plant development and why even skoomd can't meet my lettuce challenge with his QB's. Show us some plants other than cannabis under those QB's bro, chicken??

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I'd also like to point out that fluence bioengineering's LEDs are used in maaaaaaaaaaaasive argricultural greenhouses all over the country. They grow veggies exclusively and the growers report they are the healthiest plants they've ever grown AND contain more nutrition in the leaf matter. That's coming from DEHPS mind you.

LED plants of all kinds grow beautifully

I take it GML had a poor run?

OneHitDone said:

We all have seen through the "No heat" led claim.

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My leds run super warm. Way hotter then i thought. Didn't you see the GML video where he was 84-85 degrees? I got something to tell you to. My wife says she thinks my current grow that the buds look smaller at this time in the grow. Ill show you if you want to judge. I told her could be the strain. Im so scared.........

a mongo frog said:

My leds run super warm. Way hotter then i thought. Didn't you see the GML video where he was 84-85 degrees? I got something to tell you to. My wife says she thinks my current grow that the buds look smaller at this time in the grow. Ill show you if you want to judge. I told her could be the strain. Im so scared.........

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They are warm. 500 watts from these LEDs is gonna turn into 500 watts of heat sooner or later. It may be 50% efficient meaning 50% of the electricity goes directly to heat, but the other 50% that is light gets turned into heat after it gets absorbed on the surfaces in the grow space. And since most people directly cool their HPS lamps with cool tubes/vented hoods and most people do not do that with LEDs means they do make the grow space quite warm.

a mongo frog said:

My leds run super warm. Way hotter then i thought. Didn't you see the GML video where he was 84-85 degrees? I got something to tell you to. My wife says she thinks my current grow that the buds look smaller at this time in the grow. Ill show you if you want to judge. I told her could be the strain. Im so scared.........

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It isn't about the size of the buds, it's about the weight. LED-grown bud tends to be more dense, and therefore appears smaller, though there's every bit as much of it there.

Humple said:

It isn't about the size of the buds, it's about the weight. LED-grown bud tends to be more dense, and therefore appears smaller, though there's every bit as much of it there.

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I grow for big dense potent buds. If led really produces small buds I'm out. I get rock hard buds all day with hps just like everyone else.