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Far-red: The Forgotten Photons

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In this video, Dr. Bruce Bugbee reviews recent research on the powerful effect of far-red photons on plant growth and development. The summary includes the evidence for the direct value of far-red photons in photosynthesis as well as their value in promoting leaf expansion rate in lettuce. The evidence indicates that we need to redefine photosynthetic photons to include wavelengths beyond 700 nm. The availability of efficient far-red emitting LEDs means that there are immediate commercial applications of this research for indoor agriculture.
VIDEO CONTENT
03:22 Far-red photons are right on the edge of visible light - 700-760 nm.
04:02 We typically break up light into three categories: blue, green, and red.
04:45 A story on Dr. Shuyang Zhen's research with four growth chambers measuring canopy photosynthesis with different lights.
06:06 The results of the study are opposite from what you would assume because of adding far-red photons.
07:53 Do white lights grow plants equally well compared to red/blue lights?
09:49 A summary of the spectral effects of different colors of light: blue photons, green photons, red photons, and far-red photons.
10:50 Bright white light is excellent for human vision to diagnose plant health to find insects, nutritional disorders, etc.
12:36 How well different colors of photons penetrate leaves.
13:33 Why did adding far-red light cause better growth in Dr. Zhen's study?
14:32 A history of the classic PAR curve from Keith McCree's research. McCree only had primitive tools to develop his curve. He had to measure each color of light separately. We have better LEDs and better tools to measure light and combinations of lights now.
15:47 A diagram of what happens with photons in the light reactions of photosynthesis.
17:53 Far-red photons all by themselves are not effective. But they work extremely well synergistically with all the other colors of photons.
18:26 There's a law that relates to photosynthesis, solar panels, and human vision: The Stark-Einstein Law. One photon excites one electron.
19:35 Is our definition of photosynthetic photons correct?
21:12 The effect of far-red happens in every plant species is the same. Far-red photons are equally valuable as the other photons.
21:53 The commercial implications.
23:03 The response of plants to shade/far-red and the effect on plant shape.
26:59 Historically, we have quantum sensors to measure PAR, but they don't measure far-red. You need an Apogee PAR-FAR sensor that separately measures PAR and far-red photons.
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Опубликовано:

6 сен 2024

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Комментарии : 356

@niltoncometti 4 года назад

Congratulations, Professor Bruce. You were my phD advisor and I see you're still brilliant as usual.

@aayatwomenchildrenshospita6179 4 года назад

NILTON NÉLIO COMETTI @ I want to know which white LED has been used in this experiment ? Is it cool white or warm white ? Which kelvin light is best as grow light ?

@Cavscout101 4 года назад

This dude sciences

@r3drumg33k3 4 года назад

@@aayatwomenchildrenshospita6179 3k-4k with far reds. Some growers say the far red does not make more yields just more frost.

@MarvinMonroe 3 года назад

Nice

@jamesbell9577 3 года назад

Aaa aaaaww qaqqq

@Rando-yg2jf 3 года назад

I wish I could thank you all personally for your work and dedication. Thank you professor B, Shuyang Z, and Paul K for your research. It’s greatly appreciated.

@LGW3-Orchids-Exotics 3 года назад

This is a great educational video! Many parts intrigue me! I'm now curious about nutrition density. Take for example the lettuce exposed w/wo far-red photons. The far-red exposure grows larger, but it may also not be as nutritious. I have read and heard of other studies on blueberries, strawberries, etc. (now versus 50 years ago) and how sizes have increased, but nutritional densities have decreased significantly (obviously some factors like over-farming, soil nutrient depletion, ultimately under fertilizing contribute - who knows...). I guess one would also have to consider a plant has a theoretical limit of growth versus time + far-red exposure - that even if more fertilizer was supplied to assumingly keep up with growing demand, there may still be some nutrient density depletion. Super interesting to ponder!

@atimoti 4 года назад

Horticulture is such a small field, I never expected to see Paul being mentioned! I was in undergrad with him

@nemohoes9792 3 года назад

can you come out with a video on UV light next? "The Other Forgotten Photons"

@samfisher8426 3 года назад

haha i was thinking of the same thing

@eyeswideshut2800 3 года назад

Bud growers haven't forgotten.

@AthosRac 3 года назад

He said in another video that this is what he is researching right now.

@davidgdraper6269 4 года назад

Hi Bruce, Could you get Apogee to make an entry level meter for those of us setting up indoor grow setups. Most of us can’t drop $585 to adjust our lighting when growing, during cold/dark months. $585 is almost as expensive as buying 2 x 550w Shenzhen Quantum Boards. I picked up a Lux meter, but that just gives me basics. All of this is very interesting for those of us that love to grow, especially our own medications. We will be sure that growing and harvest are done right. I don’t know anybody with an Apogee unit, but we would all drop $250, in order to get the proper setups during each grow.

@Trrenik0kb 2 года назад

I agree 100%. It would be excellent if they do such a thing. Hell, i would give 250 for a par meter.

@elgriego74 4 года назад

Please, Dr Bugbee, make the sensors a little cheaper as we are millions of micro growers around the world that we would love to have Apogee Par and light spectrum sensors but they are expensive. Help Apogee "lift off" (pun intended if someone knows the meaning of the word) and become the only name among growers as your instruments are scientifically calibrated and therefore give accurate results that can be used for comparisons and benchmarks. Greetings from Greece!!!!

@derp195 4 года назад

Making very high quality, well calibrated and very accurate equipment is expensive. Especially when there isn't demand for millions of units.

@sirzebra 3 года назад

@@derp195 That's pretty much what he's implying : a lower cost and lower precision tool designed to be cheaper and reserved for personal and hobby use would make the market much larger, selling millions. Doesnt detract from the high end scientific precision tools they can sell to professionals as they do now. I'm sure they could pull that off without sacrificing much in the way of usefullness for amateur growers.

@uraninite8151 3 года назад

@@sirzebra and aquarium guys too. Id love one. I wonder how much of these videos are applicable to aquatic plants? Especially pigment production is what im interested in, and spectrum for optimal plant growth with good forms under water , which is quite different to light through air.

@derp195 2 года назад

@13thExit Strategy It's mainly two things. It's expensive to make very precise instrumentation, and it's expensive to produce small numbers of things. If millions and millions of the things were being sold, the price could come down a lot because of the economy of scale.

@maverickmace9100 2 года назад

I got u buddy. SpotOn Quantum PAR meters are now $300US. Sorry professor... You can make a spectrometer yourself very cheap. All you need is an old DVD, webcam, a little box, and open source spectroscopy software for free online. There are you tube videos on how to make it. Very easy.

@letsgrowtogether473 2 года назад

As said before by others it would be greatly appreciated if there could be a cheaper model for us at home growers. Not that your companies prices are outrageous but they are outta reach for most small time home growers just starting out or even the hobby growers who still want to do it right. You are the best and that's why we ask, of course we could buy from inexperienced companies who just wanna make a buck but have no quality because they wouldn't even know how to make a quality product but that's why many like myself wish you could help. Know you need to make a profit so maybe just a cellphone connection or app, or cheaper quality device but still with Dr. B's approval so all are happy. Know I should just save up but it's truly hard RN. Thank you tho as always and it's very appreciated that you took so many years learning than kind enough to share so much knowledge. The fact that you give props to everyone along the way shows great character as week. You're a great man Dr

@TheHst001 4 года назад

this is the best most informative video i have seen on light.

@imaginariumtv2581 4 года назад

Correction: most informative channel I've seen on light

@tolksam1291 3 года назад

Hey! In conclusion far-red is not good for the early stage on cannabis right?

@Trrenik0kb 2 года назад

@@tolksam1291 yes that is right. Far red is the best for flowering.

@tolksam1291 2 года назад

@@Trrenik0kb thanks

@spicy6892 4 года назад

If you want a hit video, make a perfect spectrum and PPFD recommendation for different ftxft areas FOR Cannabis, because there are huge online communities all debating over this topic and you have the means and evidence to give a very good answer. There are a lot of companies offering custom LED chip setups and your recommendation would definitely help a lot of people and give people a bit of courage to try it and then we could end up with a lot of free research out there.

@skankhunt420 5 месяцев назад

To me personally, it's incredible how fast this knowledge from a few years ago, has already been implemented into modern grow lights, which are also getting cheaper by generation!! Thanks to ANY proper scientist in this world ❤

@HugoJanKanAl 3 года назад

Incredible. I was taught photobiology using the old handbook. Many thanks for the update, Bruce. Very clear overview of the testing methodology, results and implications.

@user-zz8kt4bt2j 3 месяца назад

Yo that introduction of himself in the beginning of the video are straight bars !!

@devjyarn 4 года назад

Were you able to find any times throughout the lifecycle where far red was beneficial in cannabis, and at what % far red was the benefit found? I really appreciate all of the great information your channel puts out, and these latest talks from Bruce are invaluable. Looking forward to fitting a greenhouse with your sensors and meters to inform my practices.

@stewskinner5717 4 года назад

Right near the end of the video he does give a few tips for when to use it. My takeaway was to use it for seedlings, which makes sense to help them get up from the soil, but I wouldn’t use it for more than a few days. Also, use it during flowering. Since it helps enhance cell expansion, that effect would most likely apply to the growth of the buds causing them to grow larger (albeit possibly less dense) since during late flower most cannabis plants are focusing on reproduction priority during that time. It’s also important to note near the end when he points out the single flower on the tomato plant. I believe he’s implying that the use of far-red during a plants normal veg state can trigger flowering.

@devjyarn 4 года назад

@@stewskinner5717 the tomato at the end was used to highlight the fact that far red can induce earlier flowering in plants, a desirable trait if you're trying to produce bigger crops faster. Thanks for sharing your ideas.

@chrisbailey7384 3 года назад

Far red is still visible to the human eye, just not as bright as the 660 nm led. Far red (730 nm) sometimes looks like hot magenta as ultra violet almost looks violet rather than deep dark blue as you can see on the CIE gamut that the violet corner curves in.

@nicholasmcpherson3921 3 года назад

I had a brilliant idea many years ago and now get to finally see IF; feral hemp can be pushed to produce 1-20% thc...without cross and back crossing. Not many studys out there and would love the opportunity to share my results!

@Rizafoolwitit 5 месяцев назад

I've watched this a few times over the past few years. To you and all contributees of accelerated plant growth, you are doing extraordinary things. Tell us how to clean our tap water next? We know, you know..😅

@bryansiepert9222 2 года назад

That photosystem infographic is amazing! So succinct and intuitive to understand

@Sgreubel 4 года назад

At the time I was growing using the SCROG method. The canopy of buds were only about 4 to 6" tall and about 2" from the CFL's. I also had a lot of air movement between the buds and the lights. I was using 12- 23 watt CFL's in a 2' x 14" cabinet with 3 shelves and 2 bloom chambers. Every other light was 2700k. Each day I would turn the scrog screen and plant 180 degrees so that each spot where the plant was getting 2700k the day before, it was now getting 6500k light. Several different cultivars did exactly the same thing. White Widow, Jack Herrer and Blueberry. I hope someone else try's this to confirm my findings. Maybe it will be useful to the indoor cultivation industry.

@marnielarocque9412 4 года назад

Hello from Prince George B.C Canada. I`m an old disabled mechanic/welder, country boy, I never smoked cannabis till i was 59ish, for the pain i had to. I have a medical grow license, but never started to grow yet but read what comes up on Utube. I told a friend of mine a few years ago as an experiment i wanted to use Christmas led string lights so i could basically bring the lights close to the plants and wrap the lights around the plant in a fashion that would provide cool light along all leaves and of different colors, so i thought a wire surround simular to tomato plant supports but adjustable {chicken wire} but close to plants and lights on the inside of the wire support. This should supply light with less heat, color control, can be plugged into timers, cost-effective if enough light is produced. As a mechanic, i viewed your light graph the way i do a hp/ torque graph, so lower light output but closer to each leaf, and i have the outdoor led Xmas lights as they are higher wattage. what say you sir just a thought experiment, i will hopefully get to doing but i hope this is worth you time to try as i have no meters and far less knowledge, PS thankyou,

@DR-br5gb 4 года назад

This is absolutely moronic. Not hating, just saving you some time. Literally a terrible ignorant idea.

@lordperezident 4 года назад

@@DR-br5gb lmao I was thinking the same thing. I'm weak haha

@silversobe 3 года назад

True science is always in revision and reconsideration. Science is never settled as much as some would like it to be. Great video!

@snorkyfin1879 4 года назад

Wow. Just wow. Thank you very much for this knowledge bomb! I think I'll have to watch this a few times

@richardlemke4240 3 года назад

Dr Bugbee drops a Pink Floyd reference right out of the gate, we know what he was doing in college... Love the vids Bruce

@geomundi8333 4 года назад

Wow some great research based presentations; this whole series is pure gold. I love that you explore each paper and their methods, such as using a single color of light at a time to study PAR and the flaws etc. Could watch these all day again again, may things I've hypothesized about are covered in these lectures.

@keithmanfredi 4 года назад

7:46 "So what's up with that?" I love that. Great science work. I, and many, are looking forward to getting some far red for our cannabis girls :)

@David.Dawson. 4 года назад

@TFLlighting on instagram, they gave 660+730 nm

@benjaminfranklin5137 4 года назад

I'm already using far red on 13 of my plants.

@dbmail545 4 года назад

Interesting to see monochromatic LED's becoming more like sunlight. A far remove from the original "white" LED's that were blue and green combinations.

@eyeswideshut2800 3 года назад

All about those kelvins and I'll say lumens, same measurements as par. Grew an entire garden indoors hydroponically in every medium during Dec. 2200 lumens/5k kelvin T5s did the trick. Budded 8 girls on one nute through rigorous training too just because I could or got dared..lol

@ninehundreddollarluxuryyac5958 4 года назад

I used kodak high speed infrared film to photograph plants back in the 1980's. There was a kodak filter called 87-C which blocked almost all visible light and the flim could see out to almost 1,000 nanometers. At these wavelengths, healthy plants fluoresce brightly. The understory of jungles was always bright with plant-emitted infrared photons and all the leaves appeared a beautiful snow-white. Are these infrared photons emitted by the upper levels of the jungle causing the different leaf and stem shapes seen on the jungle floor? To what extent are the infrared fluorescence photons emitted from the leaves above, effecting the plants in the lower stories of the jungle? Are the near red photons you're talking about what is seen in infrared photographs of plants?

@neocortexlab 3 года назад

longwave light has very big angles of reflection and penetration refraction so oriented flux of far-red/close-IR become wide spread non oriented into a leaf and after it

@Azaruk 4 года назад

This research shows great benefit for plant manipulation, but what i would find really interesting is to use it for nutritional value instead of crop weight! Any current research on this? Keep at it

@gabrielcanela7659 3 года назад

Thank you professor Bruce. Your research just arrives in Brazil, and I’m so grateful to learn more about !

@KenjiWatanabe1 3 года назад

The comeback of incandescent light bulbs, after "phantom photons" and it's sequel "bulb wars" now comes "revenge of the wire". Silly joking aside this IS fascinating and greatly appreciated! Makes me want to make some experiments straight away. Thanks for SHARING!

@luizz_k Год назад

So invaluable, can't help but get excited for what is to come. 🙏 Greets from Guatemala 👍

@mindfulmagic 4 года назад

Got to love this science / hobby / cure / fun thing to learn and do!!!

@sk8flex639 2 года назад

Thank you so much for letting me understand stuff about lights and the effects of differences you are really appreciated over here!! :D

@chrisschuele4743 4 года назад

Loved the video and the work you guys are doing over there in Utah, makes me want to pursue a PHD and work under you. Quick question, would you recommend doing the veg stage with LEDs with far red or just white light??

@vanenburgstraat 3 года назад

Damn. Learning so much over here. Thank you Dr Bugbee! We're actually now working on supplementing our LEDs with the far red spectrum. I'd love to send you one as a gift for inspiring us to produce one. We manufacture LEDs and we focus on lighting that is optimal for mother plants.

@Trrenik0kb 2 года назад

Can you say what is the brand name of your lights?

@letsgrowtogether473 2 года назад

Thank you again for sharing your knowledge with us Dr.B!

@danielleharrison4691 3 года назад

Thank you for such an educational video. I had no previous knowledge on the subject, your clear explanations and visuals, especially your photosystem diagram made it easy to follow along.

@FiesteArg 3 года назад

Why was cannabis not included in the final examples :( Great video and information, but can someone confirm what type cannabis is? thanks!

@mysticdavestarotmachinesho5093 3 года назад

The lettuce grew bigger but did the taste change in any way?

@HipHopBeatSource 3 года назад

I want to grow the best for myself. This info is invaluable. Thank you to all involved for your work.

@savitrrakatamatah7256 4 года назад

lilac color, aqua green, and blood red. Full spectrum photography shows the best color choices in my opinion for optimal growth.

@jthreviews4u 3 года назад

Thank you yet again for another Wonderful Lecture / Class ... Each and every video you've put out is greatly appreciated Sir

@wellingtonmary640 4 года назад

FANTASTIC..., Congratulations Dr. Bruce & Postdoc scientist....Brazil UFRRJ

@Sgreubel 4 года назад

DR BUGBEE- When cannabis growers use Far Red in grow lights, do they get that additional mass (growth) at the expense of thc potency? Or does the potency stay the same? I realize that a lot of cannabis growers put volume as a top priority. But as a hobby grower, I would rather have a smaller, more potent plant than a larger, less potent plant. Also, how do we regulate the light so we get a bushier cannabis plant instead of longer internodal spacing? I also have done several experiments where I gave cannabis plants florescent light that was predominant in red light(2700k) on one day and then predominant in blue light (6500k) light the next day, switching back and forth like that every day through out the grow and I WAS ABLE TO CONSISTANTLY MATURE PLANTS THAT NORMALLY TAKE 8 WEEKS TO MATURE TO FULLY MATURE IN 5 1/2 TO 6 WEEKS. I CALL THIS 'LIGHT PHASING'. I BELIEVE THAT THIS STRESSED THE PLANTS INTO A MUCH QUICKER FLOWERING PERIOD, ALL WITHOUT CAUSING THE PLANTS TO TURN HERMAPHRODITE. THOUGHT THIS WOULD BE REALLY INTRESTING TO YOU.

@jmck5930 4 года назад

No you didn’t. If it was possible to cut 2.5 weeks off of a cycle that way every grow facility would be doing that

@claviousvillaforte8187 4 года назад

Great talk BUT, what is the bottom line regarding adding the far-red to indoor cannabis grows? More weight or stretch-ola?

@PeopleEqualShlt 4 года назад

You can control stretch using metal halide the first 10 days of flip to keep the inter nodes from stretching. Red spectrum isnt very important during that time frame.

@Mistted 4 года назад

@Mark P. What's the point of your "speculating" without any evidence? It's waste of time.

@eyeswideshut2800 3 года назад

I am officially obsessed with my cheap LED clamp lights now. They have all the light variations and dimming along with USB adapter.

@goalslice 3 года назад

How long do you provide plants the Far Red spectrum? All day just like the other lights or is there a specific time of day and how long one provides Far Red light?

@D4m4g3d 4 года назад

They do make glasses that make the other types of lights look normal so its easier to see any plant problems.

@EdlundInside 3 года назад

Wow. What great research. Thank you so much for your hard work and dedication. You're brilliant, and I appreciate your life's work.

@eyeconforeverclothing3530 3 месяца назад

Thank you Bruce

@ASQG 4 года назад

Superb research! Will use that in hemp research at the indoor farms.

@charl160 Год назад

Excellent video, thank you!

@Joonacx 7 месяцев назад

Have you though about the light colors as seasons, and changing the colors from blue to red as the plant ages?

@c1berspace469 4 года назад

nice lecture. nice graphics for understanding. nice guy. great video. Thanks for your explanation.

@richarddavis1121 2 года назад

This is an extraudinay video series. Thank you.

@getzvalerevich6565 3 года назад

Absolutely amazing research and knowledge. thanks you so much for sharing

@candicane3985 4 года назад

Wow I learned so much I will have to watch a few time to remember all hahaha. I added an extra basic red light to my cannabis plants about a year ago be for I watched this vid. from a gut feeling. I have full spectrum lights but just wasn't getting the Big buds you see in pic. Wow double the size with the red added. Wasn't sure if it was the light because I had just started Monster Bloom, I have had 2 crops with out red light but With Monster Bloom and buds smaller again. Monster Bloom gave me better results than not buds were denser but not much bigger. So with this info from Dr. Bugbee confirms to me my own test the red light is best!! Thanks Doc going back to red.

@CarlosGutierrez-vq5bj 4 года назад

Would you share what periods you used and what spectra?

@randyross5630 4 года назад

I love getting the Deep info, and this guy surely gets far beyond the mere Surface on a subject...

@superleech 3 года назад

This was a fantastic video, thank you Dr. Bruce!

@TronSAHeroXYZ 4 года назад

Instant sub to Professor Bugbee, Thanks so much for this!

@brendawilliams8062 3 года назад

Thankyou. It is a very nice presentation.

@davedefrost2174 4 года назад

Is love to see Dr Bugbee get with Dr Kruse

@timothybaker3303 11 месяцев назад

Ihaven't watched the vid yet but I'm about to. Just noticed something anecdotally regarding red light that I found interesting. I have 2 60 watt 'warm' spectrum LED lamps. I'm not sure the actual spectrum but it's noticeably red/orange/yellow like an incandescent compared to my other 'white' spectrum LED lamps. I had a regular photoperiod female under a 100 watt white spectrum LED for over a month. No signs of flowering but plenty of signs of maturity. WIthout changing the light cycle (18/6), I added the 2 60 watt lights for a total of 220 watts with 120 watts being the 'warmer' spectrum. Within days the plant started shooting pistils from the nodes just like it was several days to a week post flip to 12/12 ... This is current so I'm waiting to see what she does. She should not flower, and I don't think she will, but it's like the warmer light tricked her senses despite the daylight hours?

@timyates807 4 года назад

Thank you for sharing this cutting edge information . i figure i better subscribe . I for one am extremely interested . I enjoy the way you present it as well , your very easy to follow lol thank you once again. Take care

@zhengtenggu1778 Год назад

Just one question, in the NASA experiment with 300+50FR vs 350, is this PPFD level constant during the whole experiment? Since the FR will cause taller of the plants which might increase the canopy PPFD if the light position is fixed.

@fwnoey5659 3 года назад

you have made me want to study this .... the way you teach ..

@cancerius91 3 года назад

Thanks Dr. Bugdee. Muito obrigado!

@vladislavgordienko2792 2 года назад

Thx:) very important and intresting information on your chanel!

@jenniferredfern3930 3 года назад

Thank-you for this information...I am a home grower of salad greens, vegetables, and fruits....

@ansellovestogroworganicall2180 4 года назад

Over my head first watch, going to watch again - very interesting .... Dude is a genius!

@hidroman1000 3 года назад

excellent communicator

@copestatiq 4 года назад

This was super amazing & insightful. Thank you Doc!

@Malc.Mclagan 3 года назад

Fantastic work folks. Have you done any experiments on adding far red for a few minutes after the day period? It’s supposed to help the plant get into night state (it’s version of sleep) significantly faster.

@LINLEY1 4 года назад

I love this....Im hungry for more...I will be watching you for the rest of my life.....so get ready for me.

@fidstang 4 года назад

It would be interesting to see, what the penetration is, in the UV spectrum.

@Thedirtyfunguy 11 месяцев назад

Do you think that this is part of why they say outdoor grows get better yields. And now with this new far red Leds we can get closer to outdoor yields indoors.

@moderndiogenes 10 месяцев назад

Hey... the point is farredphotons. I could stop laughing when he said that😊

@Justintime2grow 4 года назад

China gonna watch this and we're going to see red/green lights out in 2 months. 🤣😂

@greengold6705 4 года назад

😂

@yehru 4 года назад

LED:s mimicking HPS lights, hell yes.

@christaenstrauch 4 года назад

Already tried one, giixer made one

@bigreddaman5988 4 года назад

they've been doing this..

@randyross5630 4 года назад

China's going to Harvest your Organs, bra...

@canadianguy521 3 года назад

You do great explaining things and was an excellent presentation. Thank you.

@HomeGrowEngineering 4 года назад

Great. my expensive 400-700nm apogee meter is outdated.

@mobleyMobley 4 года назад

Ha ha

@rondavison8475 4 года назад

Why do green and far IR penetrate further before being absorbed (vs reflected) Is it Blue and Red chlorophyll's that is more concentrated at the top of leafs. Or is it something more fundamental like cell or cell wall diameters that are more or less transparent to different wavelengths of light? Like red does not go as dep as blue. But that is not what is going on here with between red and blue and between FIR and Red the depth of penetration is 2x,3x,4x,5x more depth. What is the explanation for this? Fascinating lectures. thx.

@mattolsson8816 4 года назад

Cold weather crops do better with far red then? Did you all measure BRIX levels and compared that in the plants under far red vs no far red? Thank you for a great presentation.

@mau345 4 года назад

so hyped. haha. how does this change the dynamics of photodevelopmental biology though, as an application for controlled crop production systems? For example, the transition of phytochrome's form?

@pnoodeenoodee3385 Год назад

Thank you for your help.

@TreeClimberChris 4 года назад

Put the video on 1.25 speed. You're Welcome !

@CaptainFunk-pd2kp Год назад

How does the absorption of green light affect the decay of Phytochrome far red at night?

@cbarea51 3 года назад

Thank you. Everyt tme I watch one of your videos I become a better grower. Now if you can make a par meter I can afford is the only way I think you could improve the apogee company. God bless you and your company

@mrberlinmethod1492 3 года назад

This was eyeoprning. I look forward to the uv (sub 400nm) talk. If possible it would be great to know how this applies to corals

@fduro123 4 года назад

You should add Cannabis to this test, but I guess the shade avoiders and the leaf expanders could be found in differents kind of strains. Could be a nice way to distinguish a sativa phenotype to a indica one.

@hanssprungfeld7331 4 года назад

you are a true gentleman, sir. thx 4 your lessons

@catbro8587 3 года назад

We use a ton of red in veg, it wasn't deliberate, its what we had left for LEDs (HID for flower) and we still make a point to use a ton of red to this day, idk if this is optimal but we found its a great way to control height indoors..

@Trrenik0kb 2 года назад

Are you saying that red is helping to plants stay shorter or...?

@catbro8587 2 года назад

@@Trrenik0kb ours definitely stayed shorter, they would get super thick and woody ..it was only obvious because we grew clones from the same mother for a long time under different lights....we've since switched to white light LED (sp-3000) for veg :)

@Trrenik0kb 2 года назад

@@catbro8587 oh, all right. I use for vege diy led's i put together. 4000k is the spectrum and i always get short internodes. But now i started one from the begining under es300v3 and all thou it have just first 5 finger leaves it already have small branches starting. So your theory is sound for now in my case. Cheers bro.

@gabrielguimaraes9446 4 года назад

Hi there Dr Bugbee. You have stated that green light is as good as red and blue. Since it does not interfere with phytochromes, would be possible to push photosynthesis throughout the night time with the right amount of green light without compromise to the photoperiod?

@mtlmmd2480 3 года назад

Good job! Thanks for sharing the knowledge sir.

@michaelbogdovitz9479 3 года назад

Love these videos. Very informative. Thank you.

@253abd 4 года назад

Fantastic info! like serious amounts within the 27min.

@Allababa666 4 года назад

Thank you for all the valuable information. What about the UV from 300nm to 400 ?

@whhe11 4 года назад

Yeah I wanna hear this guy tell me how UVa UVb and UVc effect hemp growth, since he could give real useful info.

@feammejo 3 года назад

Hi Dr.B, So the next question is if far red causes stem elongation in cannabis plants?? It seems that it could boost photosynthesis... increasing yield, perhaps partially due to further leaf expansion but if stem elongation was significant then this could also be undesirable...any thoughts or new data on this topic yet?

@AL1977CHE 3 года назад

In the case of lettuce with supplemented IR @ 730nm is there a correlation with the nutritional values as when compared with in the absence of IR?

@trpeters67 4 года назад

So is 760 nm Far-red light, a lot of websites are calling it IR. Im looking for a led grow light that utilizes far-red leds

@jamescampbell1060 3 года назад

i see the same thing but i believe 760 is still far red, certainly above 800 is infrared - mostly heat

@yungj429 4 года назад

Its the same as why when the sun is going down the rays are more damaging. Basically the longer wavelengths of the far red no matter how dim are reaching deep inside the cell walls of the leaves and plant. I gathered that from watching my blueberry bush fail and trying to figure out what was wrong. Another thing is its thermal strength.