Buds quality LEDs VS HPS

Yodaweed said:
Thats cool, still the majority of journals on here using LEDs barely pull 1gpw, most of them around .7gpw.

Here's an example

https://www.rollitup.org/t/can-700-watts-of-led-strips-grow-trees.946736/
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on youtube most grows with chinese LEDs pull 0.3-0.4 gpw. 0.7 seems average for expensive LEDs or HPS lights. experienced growers have pulled !gpw with HIDs and 0.7 gpw with CFLs. perhaps you need to believe in the magic of LEDs to see these high yields they are claiming.kind of like seeing a faith healer instead of a doctor to treat medical problems.perhaps they are just weighing their harvest wet with the stems still attached :):):)
 
nxsov180db said:
He's using mediocre strips and low efficiency drivers. When I talk about good yields with led I am referring to quality leds..
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nxsov180db said:
I don't even really pay attention to journals but there's no way a majority of the growers here are only getting .7g/w with cob led. I get over double that and I'm in the upper range of lighting intensity.
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I can link more journals that's just the tip of the iceburg.
 
see4 said:
Damn, who's hitting 2 grams per watt? I need to learn from them.

1200 grams of usable bud from a 600watt setup? Umm, yes please.
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A new grower over on another forum pulled more than 1.8g/watt using a single QB120 at 60 watts. If he had weighed the larf and popcorn, he would have been over 2g/watt. It does happen, but I'm sure the stars must align properly. And of course, growing a heavy-yielding strain wouldn't hurt...
 
see4 said:
1.91 g/w - which included everything... meaning not all usable bud. So let's call it 1.75 g/w

That's still quite impressive. But spending $2600 to do that is not impressive. Not in the slightest.
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True, but that was two years ago. He paid $46 per emitter, you can get more efficient chips for half the price or less now.
 
wietefras said:
An HPS bulb is not going to lose 15% in 100 hours. Stop grasping at straws

No. That's exactly the point. It's 100% obviously false information. You reposting it as if it's something coming from someone with authority is just lame.

We all know the reflector takes a lot of light away. That does not make it OK to post false information about light maintenance.
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Why don't you look him up and see how much authority he has..... Carlos had been in lighting longer than this forum has existed easily. He's not perfect but he's very knowledgeable.......
 
I hope to hit 1.5gpw. Im losing lots of light to open spaces and my room is apparently too cold for LEDs and this was my first scrog so I may not hit that #.

Im going to make some room changes for next grow and aim for 1.5gpw if I fall short this grow.
 
Stephenj37826 said:
Why don't you look him up and see how much authority he has..... Carlos had been in lighting longer than this forum has existed easily. He's not perfect but he's very knowledgeable.......
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He's clearly wrong. So why would I care how much authority he has? Or had. Since to me has has 0% authority left right now.

The fact that you still keep pretending that those statements weren't bullshit is in fact also dropping your creds to zero quite quickly.

I have used those bulbs myself with a light meter attached at a fixed spot under the bulb to check light maintenance. So I know know they don't lose 15% of their efficiency in the first 100 hours. In fact I know that over a single grow the light loss is barely measurable. It's so small.
 
Rahz said:
True, but that was two years ago. He paid $46 per emitter, you can get more efficient chips for half the price or less now.
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somewhat true. 3590 still go for, at best, $36, and afaik, there isn't a better cob than 3590 atm. even $1500 is too much -- I suppose if you're a guerrilla farmer looking to make some cash crops, spending a cool $2000+ on some lights isn't a big deal. but if you're a home growing looking to grow your own, $1500 is not practical.
 
captainmorgan said:
Results in the garden is what counts no matter how many university and NASA studies you point out to make or disprove your talking point. There are more than a couple people that have hit 2 GPW here and other forums also with high per sq/ft yields, with amazing quality too.
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I never argued what people have done with them already. I argued the quality isn’t better because of the light.

And I have hit 1.4 in hand watered soil with a single ended hps before. If I had more photons I would have more yield.

I put up a link that says intensity still comes first before spectrum for results also. Was proven with hps vs mh tests at u of m.

The claims that don’t matter too much are forum and you tube and Instagram word of mouth. Too many variables and honesty is troubling in these venues. Who is going to put up a video log and then tell how poorly they did in mass audience?



I only count dense buds over the diameter of a quarter. Everything else is not weighed and goes in the trim/ small buds pile for edibles.

Can I do more with what I have. Probably in time with practice. If I counted the small and larfy stuff the numbers go way up.

Too many variables. And de hps is doing the same numbers and with cmh added has the best quality. Most intensity that way and best spectrum for flowering.
 
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Stephenj37826 said:
Please quote where I insulted you.

Yes I'm well aware of mono LEDs. The university of Japan supports our spectrum and if you haven't noticed the entire led grow light industry is leaning more and more twords white. We work closer to these led manufacturers than you know. Just because we don't brag about who we work with doesn't mean we are half as clueless as you think. The tried true photon count equaling yield still stands until we see otherwise. Meanwhile people are hitting 1.5-2.0 gpw with well built white light leds. I have yet to see a magic spectrum hit 3 consistently. So until then photon count stands as the number one indicator of yield prediction.
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Can we agree we both got testy. I am sorry I took an aggressive stance with you.

I do feel that the full info should be told though.

One of the links I posted earlier showed exactly what you say here. And I have not argued with the efficiency or yield of the type of led you build at all.

The u of m proved that the most plant growth goes to the most lumens or intensity every time. It was the old hps vs mh testing.

They are now testing proper ratios of individual colors for horticulture. All I am saying is the testing has gone way beyond any single full spectrum light source. And it started that way with NASA and growing in space eventually years ago.

And the retail market got blurple back then. Soon a Chinese blurple style lamp may grow some serious plants.
 
Chunky Stool said:
My grow area is in the garage so I can choose whether to vent outdoors or keep the heat in the garage. I wonder if there's a way to share some heat with the rest of the house. Maybe blow it into the attic?
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You would just be introducing too much humidity into your attic. When all that moisture condenses, you end up with wet insulation and an overall shitty situation.
 
GroErr said:
So a well known grower with significant experience using both hps and LED, goes through the trouble of setting up a side-by-side, to the point of paying for samples to be tested, documents the whole grow from start to finish. Then some members, none which have provided any documented grows with either tech trash his efforts? Why bother ffs. Don't bother responding as I won't respond to whining bitches, just had to make a point.
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The biggest critics are always sitting in the sidelines spouting shite.
 
The top level tech has always been with discrete LEDs.
It is not practical for most people to hook up 300 discrete small LEDs.

On the other hand, it is not THAT expensive to just buy a COB, driver and CPU cooler.
Nor is it much harder than wiring up a bed lamp. SO, there is the appeal in that,
 
MichiganMedGrower said:
Can we agree we both got testy. I am sorry I took an aggressive stance with you.

I do feel that the full info should be told though.

One of the links I posted earlier showed exactly what you say here. And I have not argued with the efficiency or yield of the type of led you build at all.

The u of m proved that the most plant growth goes to the most lumens or intensity every time. It was the old hps vs mh testing.

They are now testing proper ratios of individual colors for horticulture. All I am saying is the testing has gone way beyond any single full spectrum light source. And it started that way with NASA and growing in space eventually years ago.

And the retail market got blurple back then. Soon a Chinese blurple style lamp may grow some serious plants.
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Do you actually believe that no one here has read all these studies your quoting, it is the LED section of the forum.
 
captainmorgan said:
Do you actually believe that no one here has read all these studies your quoting, it is the LED section of the forum.
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We were talking about spectrum and quality so I posted information that proves quality and efficiency is being improved already.

It was for conversation about this. I thought there would be more input on different spectrum cobs and qb’s.

Of course I was hoping others were aware of the studies. But if you don’t post a link everyone argues. If you post one. They are ignored if the don’t support the current led’s sold here.

Here anyway. It’s not the same all over. Much love for discreet diode pre built units out there too.
 
MichiganMedGrower said:
We were talking about spectrum and quality so I posted information that proves quality and efficiency is being improved already.

It was for conversation about this. I thought there would be more input on different spectrum cobs and qb’s.

Of course I was hoping others were aware of the studies. But if you don’t post a link everyone argues. If you post one. They are ignored if the don’t support the current led’s sold here.

Here anyway. It’s not the same all over. Much love for discreet diode pre built units out there too.
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My point is that this and about any other LED topic has already been discussed here at length many times. Right now discrete diode panels are more costly and don't make sense for use on our favorite plant, they do make sense for some veggies tho. There are lots of people here that supplement their white COB's and QB's with discrete diodes of reds and blues and different light recipes are discussed here often with many people doing comparison grows with different recipes. Don't underestimate the knowledge of the LED forum members here, you've been talking down to more than one member here that have way more knowledge and experience than you. Most of the sellers here started as enthusiasts that shared their experiences freely with each other and are stand up people, there is always a bad apple once in a while but for the most part are honest and open.
 
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