Drowning in conflicting plant graphs - help! (LED)

light is just photons so it does not really make sense that plants need the whole spectrum. So do plants just use certain wavelengths better than others. What about the experiments that were done and people claimed to much blue created a leafy plant. It just does not make sense. I am really lost. I do not think people really know exactly how it works. At least I do not get it. I am lost. I can't make up my mind.
Just like Rackitman said, "There is all this conflicting data out there." I think that is for sure true.

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Originally Posted by khyberkitsune

"What we are growing with LED is an articifial plant"
"Yes but the plants see all of those wavelenths as different unlike us. "

Plants don't see, period. They respond by phytochemical processes. Light is light is light is light, period. Photons are photons, there is nothing special as you are attempting to point out, it's just that plain and simple. Get to my level in optical physics and photobiology and I think you'll be racing to edit most of your posts.

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Hubris does not suit you well.

I was at a hydroponics class last week. I proposed the led concept to our instructor. A man whom carries a PHD as a title. His exploits include 25 years in the agro-genetics division of a few different seed companies (corn,sow,cotten that kinda thing) as well as some time in academia. When I told him what I had read on the internet about 2 color grow lights....................................HE ROARED WITH LAUGHTER.

The simple fact that led take 2-3 week longer to finish should let us all know that something is missing. There is room for investigation, all the answers are not yet know. And most importantly there is no perfect.

"Hubris does not suit you well. "

Never has, never will. I'm upfront and in your face, beating around the bush is for cowards.

"HE ROARED WITH LAUGHTER."

He roared with laughter, ignoring EVERY OTHER PUBLISHED STUDY THAT PROVES OTHERWISE FOR THE PAST HALF-DECADE?

What a waste of PHD. Those that can, do. Those that can't, teach.

"The simple fact that led take 2-3 week longer to finish"

Umm, where do you get that? My 9 week strains finish at 8-9 weeks, as typical. You know the *EXACT* same nonsense was said about CFL grows, as well?

In my experience, anyone who roars with laughter usually do so because they are confronted with information that does not conform to their learn experience and/or challenges their methodology. All to often this is internalize and interpreted as a personal challenge. Occasionally, though, it is because they have direct experience upon which to base their contempt. In this case, I'm guessing the former.

As for hubris, I too am an upfront kind of person. Better to hit me with what you got so I can learn from my errors. I do the same by others. Further, I always recommend that people not try to interpret the "tone" of comments made in email or on line. It is the source of too many unnecessary flame wars.

For me, LEDs offer a solution to a grow situation that can not tolerate heat due to lack of external venting options. I can not comment on 2 or 3 weeks extended grow time but even if that is the case, so be it. For me HID is just not an option.

Well, you still have to have SOME ventilation, even with LED. Without air refreshing, you're going to suffer greatly.

Quote:

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Originally Posted by bigsby

As for hubris, I too am an upfront kind of person. Better to hit me with what you got so I can learn from my errors. I do the same by others. Further, I always recommend that people not try to interpret the "tone" of comments made in email or on line. It is the source of too many unnecessary flame wars.

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Very well said. :thumbsup: And noted.

I too, am a more "in your face" kinda guy.


"What a waste of PHD. Those that can, do. Those that can't, teach. "

Dude.......So he disagrees with you ...he must be a moron. He left the industry because he enjoys teaching. Thus I found myself in his class. Well actually I am only in the class cause a first timer friend wants to go hydro..I am a dirt kinda guy but that is neither here nor there.

Moreover since this was a hydroponics class and not a grow pot in you bottom dresser drawer class, his comment and opinions hold more water. Cucumbers will not grow properly without green light for example...(a fact bandied about on this forum regularly). So since he is teaching a class on growing everything(hydroponically) there is an example where a 2 color light would not work properly. :jointsmile: I am sure that an extensive study would find many more examples of terrestrial plants that have specific wavelengths of light required for one phase of development or another.

The number of people on this forum alone commenting on UV light and its effects on resin production should give other readers pause.....
khyberkitsune the tone of your response...speaks volumes...however your insist are invaluable. I look forward to some more spirited debates in the future.:jointsmile:

"So he disagrees with you ...he must be a moron."

You want to say where I said that? Don't put words in my mouth that were not said. That's the lowest form of bullshit known on the planet.

"Moreover since this was a hydroponics class and not a grow pot in you bottom dresser drawer class, his comment and opinions hold more water."

Oh, pardon me, but if you check some of my other posts, you'll quite firmly note that I do far more than cannabis. Oh, wait, I'll just save you the trouble and repost the pictures here. This is my Australian partner's test shed, and then a couple of pictures from my own personal garden.

He left the industry, that's a shame. No wonder he laughs at the idea of two-color growing. Too bad it's here AND IT WORKS. If it weren't worthwhile, why would NASA be looking so heavily into the technology? I think your PHD teacher needs to open his eyes a bit more, or at the very least adjust those side-blinders to be a bit wider to allow for some peripheral hindsight.

You think that little blurb in my signature is just for grins? No, sir, I do REAL HORTICULTURE. If you think I'm going to waste a formal horticultural science education on a single variety of plant, I've got a couple bridges to sell to you.

Damn Khyber, those pictures say it all, eh?

I do have room-to-room ventilation that will draw sufficient "fresh" air and I crack a somewhat remote window so I am not ventless, though I'm quite sure someone with more skill than I could do a sealed grow with C02 added, no? In addition to my ventilation challenges I also can't stomach the idea of an HID burning my house down. Yes, I could set it up to be as safe as possible but it only takes one freak accident to burn it all down... I wouldn't be able to leave the house or sleep at night. It would be on my mind all the time.

On a side note, my best profs in both undergrad and grad were the adjuncts that held full time jobs and taught one or two course per semester after hours. They brought the real world into the classroom in a way that the full time profs never could.