greengrassgrower1
Well-Known Member
To much BS, this could have been a great thread.
Quantum Boards or COBS?
- Thread starter OrganicGorilla
- Start date
They've probably just discovered HPS and are getting over excited about last century's tech not realising we've all been using them 10/20 years and are on new stuff now.
Chunky Stool
Well-Known Member
Not to mention that you can get into a nice digital HPS rig for way less than $100 (craigslist). My last one was only $75 (600w Lumatek ballast & 6" blockbuster reflector.)HPS is still hard to beat and we don't talk about the 845 peak and its effect either. So tit for tat really.
I predict in the Year 2000: That we will see IR diodes added to led setups.....Then there will be arguments over which IR is better.....
cdgmoney250
Well-Known Member
Are you saying that the 845nm peak in IR energy is by design and not a by-product of the bulb chemistry?HPS is still hard to beat and we don't talk about the 845 peak and its effect either. So tit for tat really.
I predict in the Year 2000: That we will see IR diodes added to led setups.....Then there will be arguments over which IR is better.....
Abiqua
Well-Known Member
no...but i am interested in what you think about either scenario....design/bulb chemistry?
. .... IR leds are available in specific nm and will be used in some capacity...my opinion
Greengenes707
Well-Known Member
@cdgmoney250 and @Abiqua You guys are bouncing around a few concepts you might want to dive deeper into.
Q10 coefficient of the plants metabolism and the RQE above 700nm.
You guys might like this...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC286034/pdf/pnas00103-0306.pdf
It also shows green/yellow efficiency when as a intracanopy lighting.
Q10 coefficient of the plants metabolism and the RQE above 700nm.
You guys might like this...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC286034/pdf/pnas00103-0306.pdf
It also shows green/yellow efficiency when as a intracanopy lighting.
cdgmoney250
Well-Known Member
Thanks for the link! I didn't realize that IR past 750nm had that much (albeit relatively low) quantum efficiency. Very interesting.
cdgmoney250
Well-Known Member
I don't know personally in either scenario, I was hoping you might have some insight haha!
I imagine that particular wavelength of IR is an incidental by-product of creating a fuller spectrum by arcing a filament. Just based on the IR regions of HPS, MH, and CMH all having their main peak around the same 800-850nm wavelengths.
Completely guessing here.
That being said, it does appear that at least very small quantities of IR seem to increase total overall photosynthesis. I think you may be onto something with adding IR diodes in the future if technology doesn't take a turn for awesome.
Abiqua
Well-Known Member
There is definitely photosynthetic activity from IR in some amounts and I am sussing out other biochemical activities from IR exposure. Also reading the about the Kok effect [sorry dirty birds, probably not what you were thinking] and it how might relate with photoinhibition over 700nm.....
Information varies and most of what I have read previously was invitro, although now I am reading some interesting papers using flourometry and if it can be used in vivo.
I guess the more I read, the more I see a more chaotic pattern, lol
2014 - Lysenko-Far-Red Spectrum of Second Emerson Effect: A Study Using Dual-Wavelength Pulse Amplitude Modulation Fluorometry
1995-Tyystjarvi and Aro - The rate constant of photoinhibition, measured in lincomycin-treated leaves, is directly proportional to light intensity (photosynthesis/photosystem II/Dl protein/chlorophyll fluorescence).
1984 - Sharp - Kok Effect and the Quantam Yield of Photosynthesis: Light Partially inhibts Dark Respiration
Deciphering the 820nm-signal: redox state of donor side and quantum yield of Photosystem I in leaves.
Oja 2003
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sixstring2112
Well-Known Member
just wanted to put this out there.i have 2 securuty cams in my flower room,785 nm ir but not all the plants get hit with these 2 cams.these run 24/7 but anyhow,i do not see any effect on the plants weather they are on camera or totally shielded from them.maybe its me secret sauce ?
Abiqua
Well-Known Member
im not saying photosynthesis occurs even as high as 785nm, because most likely IR's potential is in the longer wave section, but what biochemical reactions are happening? Maybe not just photosynthesis, but a process related to photoinhibition as well.....
There are documented levels of some photosynthetic activity above 700 and even above 750, but most if not all was in vitro......
Humanrob
Well-Known Member
@Greengenes707 -- do you know if they tested for THC levels from both sides in that comparison?
I've seen a few side by sides at this point, and as @CobKits pointed out, unless the rooms and grow medium are separately optimized for each kind of light, it's not comparing their actual potentials.
But beyond that, there is more than just weight to compare, there is also quality. Whether its commercial, medical, or personal -- getting a few more ounces but not having it smoke as well is not worth it (and from what I've seen, 3/4's of a lb. of dense sparkling bud with 20% THC will sell for more than 1 lb. of average looking bud with a lower THC %...). THC is not necessarily a measure of quality, but it is at least a testable factor.
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Humanrob
Well-Known Member
You might be right, in other tests when one side was "frostier" than the other, it's been mentioned. I suppose the difference between COBs and DE is not as great as the difference between indoor and outdoor, for instance.
cdgmoney250
Well-Known Member
I completely disagree, as COB's have grown some of the frostiest bud I've ever seen while completely lacking in UV.
Trichome production is a secondary metabolite function of the plant and relates to health. UV is not necessary to achieve this.
Explain how jacketed Bulbs in air-cooled hoods (this means no ultra-violet wavelengths) are still growing the dankety dank. Like strains testing out at over 30% cannabinoids.
Yodaweed
Well-Known Member
Does the Glass included with my reflector block UV and/or Heat?
Yes and Yes. All glass has naturally occurring UV inhibitors but we are not adding additional filtration as some amount of UV is known to be beneficial, the primary function of the glass lens is to aid in heat retention and evacuation (air cooled).
Some UV light still gets through those air cooled hoods.
https://www.sunlightsupply.com/page/frequently-asked-questions/