Utah State University LED Greenhouse Research

spazatak

spazatak

Well-Known Member
Bricksquad2625 said:
Just as the title says, USU did research for LED vs HPS, as well as give independent research on the all the major LED competitors. Just wanted to share this with everyone and I hope it pisses some of you guys off who purchase some of these ridiculous leds. I have the spyder600 1 of 2 of the best brands recommended for your ROI

enjoy

http://cpl.usu.edu/files/publications/factsheet/pub__7199661.pdf
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Why do you care what people buy... you sound like a complete wanker
 
hyroot

hyroot

Well-Known Member
thats a funny and b.s. first they use gavita and papillion. they don't state what bulbs. they use cmh but don't state any brand of bulb or show par values.. all the led's they used, most of which are older models that have been discontinued. The top led companies are not even in that study except for apache,. They discontinued the At120. they didn't compare multiple leds of same company to match footprint of the 1000w. it would take 4 at120's . they compare 1 at120 to a 1000w, now c'mon... thats a very biased study. More propaganda bullshit. You would have to be pretty slow to not catch any of that... they compared 1 illumitex strip to a 1000w wow! Also they don't show the cri of any light either. This study must of been done by student with a C average


fyi nobody recommended spyder . its a lower quality knock off of illumitex
 
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Bricksquad2625

Bricksquad2625

Well-Known Member
lol lower quality? how do you KNOW that?

And discontinued? You can still purchase all of those LEDs, and they are being advertised on all of the manufacturers websites. I believe you are misguided
 
Bricksquad2625

Bricksquad2625

Well-Known Member
And did you read the article? Its stated in the introduction "The two most efficient LED and the two most efficient double-ended HPS fixtures had nearly identical efficiencies at 1.66 to 1.70 micromoles per joule." then if you scroll down and read the graph you will see the umol/J rating of the BML spyder which is "1.66" you should read.
 
Bricksquad2625

Bricksquad2625

Well-Known Member
They were comparing umol ratings and photon output, not footprints, I would rather know PPF, PPFD, umol, umol2 over footprints lol and I would love to hear where you graduated from since you would like to put down another researchers work? Put your degree up, I got one in Political Science and my fiance has one in Biology
 
hyroot

hyroot

Well-Known Member
Bricksquad2625 said:
lol lower quality? how do you KNOW that?

And discontinued? You can still purchase all of those LEDs, and they are being advertised on all of the manufacturers websites. I believe you are misguided
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they have a handful left but are no longer making them. Hence the dramatic drop in price.

what efficiency are they referring to , electrical or photosynthetic? Comparing par rating is only fair if the foot print is the same. You can't compare par ratings of 1 led that covers a 2x2 to an hps that covers a 4x4. That just doesn't make any sense to do that. There are so many holes in that study
 
Bad Karma

Bad Karma

Well-Known Member
Bricksquad2625 said:
I'm smoking on a blunt of OG, we just laughing at your ass nigga, we ain't mad
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Spoken like an intelligent, caring person, just trying to spread some good news to the community.


Bricksquad2625 said:
lol lower quality? how do you KNOW that?

And discontinued? You can still purchase all of those LEDs, and they are being advertised on all of the manufacturers websites. I believe you are misguided
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Hyroot knows that because he actually contributes and reads this LED forum threads, you obviously don't. This was posted on Tuesday in our forum.
Greengenes707 said:
Apache is blowing out the at120 for $537.00

It's not on the site, no code, or anything for it. You need to call and ask about them, say you heard about it from me or at the max yield show. It's the last there is of the 120's, when they are gone they're gone.

888-727-2243
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source: https://www.rollitup.org/t/led-companies-w-links.486179/page-87

Bricksquad2625 said:
And did you read the article? Its stated in the introduction "The two most efficient LED and the two most efficient double-ended HPS fixtures had nearly identical efficiencies at 1.66 to 1.70 micromoles per joule." then if you scroll down and read the graph you will see the umol/J rating of the BML spyder which is "1.66" you should read.
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The article and research is full of holes, just as Hyroot stated above.
So a lopsided, miscalculated, experiment, done for propaganda, really makes you feel like a man?
It gives you something to come in here and gloat about, right?
Hope about some pics of your sweetass Spyder grow instead?
That's what the real men around here do, so whip'em out, and prove it.
Otherwise, keep smoking on that OG blunt of yours, because that's about as close to being OG as you'll ever be.
 
Bricksquad2625

Bricksquad2625

Well-Known Member
Bad Karma said:
Spoken like an intelligent, caring person, just trying to spread some good news to the community.




Hyroot knows that because he actually contributes and reads this LED forum threads, you obviously don't. This was posted on Tuesday in our forum.

source: https://www.rollitup.org/t/led-companies-w-links.486179/page-87



The article and research is full of holes, just as Hyroot stated above.
So a lopsided, miscalculated, experiment, done for propaganda, really makes you feel like a man?
It gives you something to come in here and gloat about, right?
Hope about some pics of your sweetass Spyder grow instead?
That's what the real men around here do, so whip'em out, and prove it.
Otherwise, keep smoking on that OG blunt of yours, because that's about as close to being OG as you'll ever be.
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LOL I have pics and grow journals, I have nothing to prove. Please point out the holes? Hyroot obviously didn't read it, he didn't even know which efficiency it was referring to.
 
hyroot

hyroot

Well-Known Member
Bricksquad2625 said:
LOL I have pics and grow journals, I have nothing to prove. Please point out the holes? Hyroot obviously didn't read it, he didn't even know which efficiency it was referring to.
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they don't state which efficiency. that was a rhetorical question. it mostly talks about electrical costs. again too many holes. Are you apart of this study. Is that why you keep defending their blunders
 
bu$hleaguer

bu$hleaguer

Well-Known Member
Bricksquad2625 said:
They were comparing umol ratings and photon output, not footprints, I would rather know PPF, PPFD, umol, umol2 over footprints lol and I would love to hear where you graduated from since you would like to put down another researchers work? Put your degree up, I got one in Political Science and my fiance has one in Biology
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Said 2 posts after this one:
Bricksquad2625 said:
I'm smoking on a blunt of OG, we just laughing at your ass nigga, we ain't mad
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What school teaches that in the Poly Sci curriculum?
 
hyroot

hyroot

Well-Known Member
political science and biology have nothing to do with spectrology, horticulture, botany, physics, thermodynamics, and electrical engineering.
 
captainmorgan

captainmorgan

Well-Known Member
I can get .9 grams per watt at 25 watts per square foot with home depot LED bulbs on 6 weeks of veg and I'm sure I would break 1 gram per watt if I vegged for 8 weeks. What do you think a HPS set up would do on 25 watts per square foot. And I just ordered some LED's for a DIY that have nearly twice the output per watt as the home depot bulbs.
 
Greengenes707

Greengenes707

Well-Known Member
Honestly its a decent study...except for the use of the at120 while using other companies newest tech, hps too. The at120 is done.
I showed apache this a few weeks ago. Bruce Bugbee is good friends with Robert at apache, and in 2011 was given that at120. I can't seem to find when it was published, but it seems like months before the new AT's were released. AT says they would have given a new light in a heart beat if they were told about it. Bugbee wasn't heading the study.

I wish they would have used then new at200...or the at600. The at200 has a 80% more output than the original at120.
 
Bad Karma

Bad Karma

Well-Known Member
Bricksquad2625 said:
LOL I have pics and grow journals, I have nothing to prove.
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Okay, I checked your profile out, and you do have a grow journal, that you started today.
No pics either, our little internet gangsta can't hang, surprise, surprise.
You're absolutely right, you have nothing to prove, and you have proven nothing.
 
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