How We Are Using Undercanopy Lighting In Our Grow Rooms!

Disclaimer: This Content Is Intended For Educational Purposes Only. We Do Not Endorse Or Promote Illegal Activities Related To Cannabis. Please Adhere To The Laws And Regulations Of Your Jurisdiction Regarding Cannabis Use.
This Is A Video From The Craft Farmer Academy, The Only Online Cultivation Program By Growers, For Growers! We Help Arm Small-Medium Sized Cultivators With The Tools & Resources They Need To Achieve Yields As High As 90g/ft²! If You Are Interested In Leveling Up Your Current Cultivation Strategy, Visit www.craftfarme...
In the video, Alex Ethier, Head of Cultivation at Craft Farmer™ talks about our strategy for using The Craft Farmer Undercanopy Lights™. The Craft Farmer Undercanopy Lights™ were designed in California By Growers, For Growers, with the goal of helping Cultivators of all sizes maximize their space to the fullest. We have seen increases in our customers' yields by as high as 40% after installing our Undercanopy Lights and implementing the SOP highlighted on www.craftfarme...
If you are interested in The Craft Farmer Undercanopy Lights™, visit craftfarmer.co... and order yours today! For larger orders and inquiries, reach out to @Craft_Farmer on Instagram or Email [e-mail]

[@hamlonehamlett1060]

BRAVO from a seed connisuer. I've been doing the under canopy lighting for 30 years. Today's lights are way more efficient than the past lights. Growkind

[@loganleborgne420]

This setup is useful if you grow like this....multiple topping and a long veg (it must be longer than 60/70 days I guess as I never went this way...and I hate cutting my plants!)isn't the way I and I guess a lot of other growers go...I have to veg during the flowering period of the others so I choose scrog with a solid net to use it to train the plants and a few pinching to keep everything uniform and use all the space available...so I get multiple tops I grow horizontally so plants are shorter less than 3 feet! But for people who like tall plants why not if the gpw is interesting...I pull 1.7/1.8gpw on average so I use all the lights and space

[@CraftFarmer]

Excellent!

[@skankhunt420]

*connoisseur ...🤦🏻‍♂️

[@chrisbkush4205]

I used under lighting in a few of my grows and I had a lower bud go from i wanna say about a 2 gram bud to a 9 gram bud easily. Along with all the other smaller low buds I was seeing tighter and larger buds. If I do underlighting I use 4 T8 full spectrum L.E.D 4 ft bars in my 4x4 and 3 2ft in my 3x3.

[@jondoe5532]

It is an interesting concept but as someone has already commented, it has been tried before in the good old days. Lighting has moved on since the fluorescent tubes that people were trying to under-light with back then but even with the 301b or 301h diodes, i believe that it would be better utilised by having an extra over-light in a new 4x4 - 5x5 grow space. The under-lights will not produce 1g per watt of extra product imho which is why i think that for the cost of the light and power it would be better to have an over-light in a new space but i still think it is interesting and worth further experimentation since the led lights these days have massive ppfd and dimming them down to 60w should suffice for most people and give those bottom popcorn buds a bit more bag appeal but so would cutting the top of your plants at harvest time and giving the bottom sites an extra week with the light lowered down towards the canopy slightly- roughly the same cost to run 2x 60w under-lights in a 4x4 for 7 weeks as to run a 750w over-light for an extra week.

[@cjgamer2140]

Yes. While there are several ways to increase lower plant production, each has their pros and cons. Been growing for almost 30 years. Under canopy lighting is nothing new, and has been done for decades. There is a reason why it never took off.

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@malloycade8626]

​@@cjgamer2140 I would guess bc this light tech hasn't been around very long, much less 30 yrs.

[@cjgamer2140]

@@malloycade8626 Ok well I'm waiting to see the results from other growers and the cost effectiveness of it all. I'm not hating, just saying this is not a new concept. Maybe these new special lights will change the game. I hope it does! Time will tell I guess.

[@cjgamer2140]

@@CraftFarmer The grow looks great! I'm just going to wait until some 3rd parties do some side by side comparisons, and give a cost to reward breakdown etc. There is no hate, just cautious skepticism. If it works as advertised, and is cost effective, it will blow up and be main stream soon. Until then I'm going to wait it out. BTW, I fully respect CraftFarmer, they helped me with good advice when I was putting together my first whip system. They definitely know their stuff.

[@wardaldo69]

I've done under plant lighting for 2 decades now 🤔🌱🥰👌👍👍 I Absolutely can't believe this is a "new" thing in 2024 😱😂🤣

[@adambauer7345]

Super informative and dude knows how to make it sound simple.

[@taivonwise7112]

Found my new favorite 420 grower. Chock full of great info. Thx and keep up the good work

[@PhillipMangus]

Mine also

[@CraftFarmer]

Awesome! Thank you!

[@kevinkc3onohelijeepworld953]

Didn’t do under light but back in the day I had side lighting 4’T8s stack two high on both sides of my space with hps n mh over head. I had bud 12”-36” solid thick. The t8 s were 32w 3k nothing special. But dam did it work for the strains I was working with 😊

[@JW-lq9ow]

Happy to see someone not stripping half their lower leaf sites! I agree on the sugar benefits. Some of the LCG I just harvested had beautiful midsize buds on lower half. My Hova Cake lower/ mid plant bud was extremely resonance. Plus add a different Terpines profile to my smoke. Been growing 35 years. I know stripping the lower promotes larger tops. In 100% living soil,those lower mobile nutrients have helped me maintain the upper canopy through the next top dressing schedule. Used halide / HPS. Just did first grow with AC Infinity Evo diodes. Heat and electric bill benefits are night and day.thanks for your enthusiasm.

[@JW-lq9ow]

P.s. You know the lights are efficient and the reflective material working. When your lower buds come out nice. Lower leafs providing nutes for upper plant. Upper leafs providing energy for lower buds.

[@montepr803]

This grow im doing I laid the new AC infinity strips around where the trellis net sits hitting the lower bud sites that don't get the full power from the lights as the tops do. I'm getting bud density i never could get before on that lower level. Im gonna see how I strategically place more of those on my next run. It definitely looks promising 👌

[@concreter6832]

I bought 2 sets of the AC 40 watt supplemental lighting and did similar to U,it was a waste of money and power, just grew extra larf,they need a lot more power.

[@malloycade8626]

​@@concreter6832aren't those for clones lol

[@Intrepidchronix]

Been doing the same thing lately x love the lower lighting and on the walls as well

[@corntrader1455]

Do you see a difference?

[@iananderson33able]

Definitely a huge difference

[@TestNuggzz]

Only if you use shitty leds

[@user-sx7zo3ru6m]

@@iananderson33able yeah big difference in electric bill.... bud, not so much. this is a scam

[@sunnohh]

@@corntrader1455not really, unless you don’t trim your larf and want more larf and a bunch of extra hastle

[@FlavoursFarmUK]

I've been following on Instagram for some time and have been curious about these undr canopy lights and how effective they could be. Good work on the innovation 💡

[@danielmonteiro8074]

More than a minute in . And I'm so there bro. Nice n very informative . 🎉🎉❤

[@CraftFarmer]

Glad you liked it

[@TrollHunterxXx]

I trust craft farmer … there’s no way they would do this if it didn’t return. But most hobbyists have so many things to spend their money on to better their results this is for after everything is dialed in and your looking to boost as much as you can when all other avenues have been exhausted

[@DavidfromMichigan]

The lower epidermis (underside) contains the stomata, which breathes Co2. Excessive heat can cause the stomata to close, reducing photosynthesis all together. Chloraplasts are located on top, but there is a small percentage located on the underside, so, in theory, you would gain a small percentage. That's if your temps are high enough to close those stomata.

[@GTS9550J]

Interesting thanks

[@rcheatbustafans4859]

interesting 🤨 thx for sharing 👍

[@CraftFarmer]

So many comments about how it doesn’t work and baseless opinions. How do you explain the crazy yield gains and quality? If you don’t believe in the tech or science I very strongly suggest you check out @craft.farmer on Instagram as we post daily our results from the Undercanopy. Opinions are just that, opinions. We actually debunk myths and opinions and show you real results.

[@CraftFarmer]

Plus the last thing I would be doing is wasting my precious time and money on making them and using them if it didn’t work. You do not need anything overhead then a 600 watt LED overhead light and 3 Undercanopy Lights (360 watts) to get insane results and incredible quality. All strains in house are now doing 80-124 grams a Sqft with 9 - 1 gallon pots and a 14 day veg.

[@SAR0311]

Very interesting. I just wonder if they add more trouble to work around with the plants

[@sidecardude]

looks like a waste of electricity, I"d need data, but my experience favors trimming all those small twiggy buds on the bottom and letting the energy supply those big buds on the top....

[@jansondennis2438]

yep trim up them legs . just more crap on the market fkin advertising mate

[@CraftFarmer]

Post data and videos all the time on Instagram. We just posted a video of lower buds on our latest @CraftFarmerAcademy Instagram stories. More data will be coming soon on @CraftFarmerAcademy

[@maneiloveyall3672]

Shit a total waste, get on board with the Elite ones. Dude Grow Cup in Fort Collins be there

[@neilsunstrum933]

Overall weight is more but yes, smaller buds, more trimming.

[@Zec-xe8oz]

How much electricity does a florescent light rly use makes sense not much money to try

[@cjgamer2140]

7:14 - 8:46. This is great info. Are you talking about the EC you are feeding the plants, or the substrate EC. I still use DE HPS, and I have experienced burn if substrate EC goes over 4.0 for any length of time. While my buddy who uses LED says he goes as high as 7 in his. Could be different substrate sensors giving different reading also 🤷‍♂

[@CraftFarmer]

Substrate EC. We push our DE rooms as well,

[@clwnpRon]

Two reasons not to bother with Undercanopy Lighting, Inefficient Light Utilization and Diminishing Returns.

[@lgphato2115]

The University Of Utah has proven that far red and undercanopy lights are not effective. Do not use them. They will damage your crop. This is dude is bro science on display. Look it up folks. Science is awesome.

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@TNBNaturals]

Are you guys using the TNB Naturals pH adjusters? It’s non kostic and doesn’t harm the beneficial bacteria like all other pH products on the market.

[@cheflife420]

Sweet just added under lights at 16 days. So we will see

[@audioman99]

Good job!

[@CraftFarmer]

Thanks!

[@crazyjay6331]

Ive seen people hang cmh/hps bulbs in between two rows of tall plants like sidelighting, more lighting angles would make sure no leaves are being shaded.

[@malloycade8626]

I have too....high times magazine in the 90s

[@hansmeier-72]

@@malloycade8626 exactly...i remember reading that in a corner of ASK ED, with Ed Rosenthal back then....still got the mags, just gotta find it

[@gottisgarden9682]

I just wonder what it translates to revenue wise. If I use more lights I have to use more electricity in my setup all together. Yes I might get more A+ nug sizes but at the expense of how much electricity + investment of under canopy fixtures. So how many runs until it equals out. Also adjusting your system to such additive going to be a different work rate. Increased at that. Could be a blessing or curse. Just some things I wonder. Not hating though 👌🏾

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@anthonyromano8565]

I did it on my last grow which happened to be my best yield. I had to add 6 more quare feet to my foot print this next time around.

[@CloneRanger]

This is about as funny as it gets. Plants do not conduct photosynthisis on the underside of the leaves. show me the final weights and the trim.

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@cannanostra1499]

Do chloroplasts take in light from bottom or leave? Under leaves is stomata ? There breaths in co2 and releases O2 ! If did under canopy lighting i would still hang lights in the canopy vs leave aimed up . That way will still direct light the way supposed too .

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@geraldblount4159]

Try some mirror material underneath your plants

[@donnysnooks7277]

That’s why you have white tables as well. The white reflects the light to the under canopy

[@IndoorGarden420]

Dude just make a howto seed to harvest id love to pick ur head . Dr bugbee says never turn the lights off even before chop

[@BENZO_RSK]

👍👍 Green light or lime color gives greater penetration into the depths of the leaf, helping the upper light source, what if you need to illuminate the bottom with green light, any thoughts?

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@krazykillar4794]

I will experimenting with some supplemental lighting soon . Mars hydro have released some cool stuff latley , their new VG lights can be hung vertically and horizontally. They are roughly 40w and they look cool hanging in the corners of tent ! It would be really cool if we could grow 100 % pure premium bud all the way down the stem . 😊

[@geraldblount4159]

Just use mirrors just use mirror floors that way the lights from the top can light up the bottom and you don't have to use electricity I use mirrors I get a good bud I stopped lollipopping

[@malloycade8626]

Mirrors absorb more light than they reflect. White plastic or mylar are way more efficient at reflecting light. That's why no grows put mirrors on the walls.

[@SRTERPZ]

Hey Alex do you flush your plants?

[@robertthrem3382]

Why wouldn’t you put mylar on a 4 x 8 sheet in the middle and a 45° angle on both sides?

[@IndoorGarden420]

3.5 and 3.0 ec wow thats wasting way too high but im guessing ur grow space has co2

[@LB-sk3vl]

Looks like alot of time was spent growing those tall plants only to really be able to get most weight from the tops. It would seem a shorter veg would prevent all the non essential growth and would lead you to a quicker harvest and turn around.

[@CraftFarmer]

10 day Veg

[@ericblank6232]

You said 14 days in another video 😂​@@CraftFarmer

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@mayorday3587]

Do you add more drainage holes in the bags? For air of course

[@CraftFarmer]

No we don’t

[@kgu9870]

No way that lanky, branchy plant training structure is maximizing light use efficiency

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@CraftFarmer]

@organicGreens might make a small difference clone lights are only 18 watts. My bars are 120 watts

[@cultivateyourself]

Yellow bottles of nutrients has a video on it that is years old.

[@geraldblount4159]

In theory it all sounds good but it's how much does it cost is it worth it for lights

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@geraldblount4159]

Thanks

[@geraldblount4159]

Works

[@PML720]

Now i know where all the wind turbine energy is going 😂

[@JamesRobert-p7i]

why use underlighting theres nothing below it?

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@drgr33nUK]

I thought under lighting had been debunked years ago. Its not new, guys were doing this with florescent and small HID lighting back in the 90s. That and they have their trolmaster sensors all tangled up. All the gear and no idea 😂 Hopefully its his own business and some other poor persons

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@ascendordie7427]

Ill say this.. the plant only has so much yeild potential so maxing out yield at the top canopy is what you want. You dont want your main colas being limited in weight potential by the smaller nugs on the lower canopy. If you get bigger nugs on bottom the top nugs will be slightly smaller. Balancing its self out. Everyone should know the dutch table method yeilds the most because its small pots growing only the main cola across the whole grow space, if plant count is a concern then you cant benefit from this methods HUGE yeilds.

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@ThaPepperPlug]

Bro protect your eyes 💯 you're squinting already 😅 don't wait just get your prescription set in a higher quality pair of shades ❤

[@mikelabelle420]

I don't see any evidence on the plants shown. Where's these top tier buds that should look like the others further up?

[@elijahstile-if3si]

Double yield like from 2 to 4 a light??

[@CraftFarmer]

I have posted testimonials on Instagram from other customers running the lights and doubling their yields and adding quality. For me personally across all my strains I'm at 42% yield increase. But it also fixes the color variation the flower has through out the canopy top to bottom. Instead of just purple up top into green and white sub par flower its solid purple throughout the canopy and beautiful buds on the bottom finishing properly. That 42% is across 12 strains, some yield less 35% some smash 60+ % more. If you are on instagram go to @craft.farmer

[@CraftFarmer]

Also check out our most recent video

[@joshbrown5730]

With this lighting does your defoliation process or lollypoping necessary

[@CraftFarmer]

Very little lollipop and we’re focused primarily on defoliation

[@Suchtzocker]

So are there any studys about this or are we going the trust me bro route ? (objective, ive done this for xx years blabla )

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@Suchtzocker]

@@CraftFarmer i researched after this, and my conclusion is based on the studys i found also that you have a slightly wider terpene profile, nugs get more ripe, and the yield will increase up to 25% in substances, not dry weight under lab conditions i beliebe. So in the end its more kind of an enthusiastic thing to do for cannaseurs. Consumers will pay more light, deal with the ligths and the extra cost added make it not worth for a average consumer or professional. If i could i would basically now, but im not willing to spend on extra lightbars right now. Must add also the only study i found was from a seller or a vendor or whatever in the field so its taken with an slight taste for objectivity.

[@jordanbourgeois8704]

Migro and many other reputable people say the science shows no significant increase in yield with under canopy lighting… it’s far more productive to either turn up the top lights or lower them closer to the plants

[@CraftFarmer]

Disagree

[@jordanbourgeois8704]

@@CraftFarmer with what? Science?

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@malloycade8626]

​@jordanbourgeois8704 looks like his grow proves uc lighting works...did you not watch the vid?

[@Greenthumb2013]

Nah just pissin in the wind !!!!

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@Lynsky24]

I see it as just another gimmick where growers throw their hard earned £ at something, that at best is going to give you very little return.

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@danielmonteiro8074]

Would you say .. ambient heat . Undercanopy as hot as a QB on at 40%? ;P

[@edwardhaglin2322]

Side lighting ?

[@OrganicGreens]

I feel like you would be better off with those lights on the walls or on the sides of the plants.

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@OrganicGreens]

@@CraftFarmer They do seem to be working very well. Tho im no sure if side lighting would work better or not. I guess access would be a pain with side lighting anyways.

[@CraftFarmer]

I tried side lighting in the very beginning 3 years ago and the whole inside of the canopy lacked, the bench with the Undercanopy decimated it in results

[@OrganicGreens]

@@CraftFarmer Good to know. Im considering giving it a try with a bunch of old 4ft clone lights I got lying around.

[@cultivateyourself]

Bouncing light that is 2000 PAR is doable.

[@MR-puffnstuff]

Low light uv 4 under lighting is best

[@eliinthewolverinestate6729]

We run our over head lights angled. More light makes it lower than horizontal over head lights. We also lst to fit sexually mature plants in. So we can have 25 node plants in flower. Plus we dont have to lollipop them. And whole plants is in best producing light. Which the stretch in there plants says too little light. The buds arent stacked but actually stretched in their room. This is all proven by math and yields. It don't pay to grow stems. Bare stems without bud is a waste. It dont pay to let plants grow up towards light. Your better off in prime light than lowering plants or raise lights as plants need. Running lights and plants not in optimal grow distance is wasting electric. Its commercial not a home grow. Electric and labor cost the most in a commercial grow.

[@gsillzaza]

Maybe it's a good for commercial grow...but it's not going to make that kind of increase in my tents...and I'm not selling to dispos...so I don't need to add shit buds to my weight...I'm not generating tons of prerolls dusted with dry sift to boost the thc..and adding terps for flavor

[@CraftFarmer]

There is nothing commercial about this video. Go look at my most recent video, I think you will have a change of opinion.

[@gregdeemy1495]

very interesting, but about the EC of 3.0-3.5, that is way higher than General Hydroponics recommendations, and googling 'best EC for cannabis hydroponics'. Most of those are around EC 2.3. Is that 3.0 a typo and should be 2.0? or you really can run it that high in EC? I get burnt tips above 2.5

[@CraftFarmer]

No it wasn’t a typo. Yes we run a higher EC. Generally 3-3.5 EC we are focused on what the plant is telling us more then a feed chart. Feed chart is just a recommendation.

[@gregdeemy1495]

@@CraftFarmer Thank you and way cool! Do you need to run CO2 to be able to handle the high EC? What PAR is needed to support that high level? Or are the feed charts just conservative? What pH do you maintain, or do you use a range? Any other recommendations you can give to help me try this? I am running EC 2.5 with no burned tips, 1200w COB lighting (1000 PAR) in 5x5 with DIY spray hydroponics, humidity and temp controllers, CO2 monitor but no CO2 added.

[@hatemonger1000]

How the hell is this video not age restricted???

[@SetTheCurve]

how about show some actually good buds on the bottom, not just talk about them.

[@CraftFarmer]

kzbin.info/www/bejne/kHKXpZaNoLRoesU

[@teknacious]

lets gooooooo

[@geraldblount4159]

No bull crap try mirror material it doesn't have to be expensive just something that we reflect the light back up the bottom of the plant

[@BLACKHAT-l9v]

The waste of money on fixtures and electricity and you'll never get it back there's not enough yield in life production just ridiculous😂😂😂😂

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@ambercrowder8058]

Typical commercial SOP’s concentrating on smalls. Those plants have had no training and it’s just blow and go (same feed for everyone) and nothing is catered to the individual pheno. This isn’t craft marijuana @ all

[@burmlife9744]

It's called the sun

[@eliinthewolverinestate6729]

Wow. The difference between a successful grow and failing is math. They could grow more bud and less stem. Too little light and way too much stretch. Home growers let there plants grow tall into prime light. Commercial you only grow in the best light. Whats it cost to grow an inch of stem? Figure out what is the farthest away from light you get a decent bud. Thats where canopy should be going into flower. So your not wasting 2 feet of growth. And wasting bud growth in order to grow stem in flower. Growing stem in flower is such a waste and sign of way low dli for flower. I wont even waste time trying to flower plants that stretch like that. Thats loosing half the bud. Lst it in veg. Move closer to lights in flower. Its worth the labor to lst in veg. Giving even canopy in flower. Up to 80% cost of commercial is electric and labor. Use your labor wisely. Solar electric is waste 10 acres of solar to grow one acre. Must money in commercial grows is wasted in veg. Do the math. The math teaches a lot about cost per yield and where the waste is.

[@hatemonger1000]

It harms the plants do not do this!!!!

[@skunkysweat]

Welp... im pretty sure that only the top side of the leaf surface can absorb photosynthetic light energy..😂🎉 so pretty sure these guys need to go back to biology class.. crazy they put people so dumb in charge of such big grows, wild lol😢

[@owen4388]

Promo*SM 🎉

[@TheMajorGeneral]

bust out the light meter....looks weak....400 umols max...best guess 😂😂🤔 Oh Canada 🇨🇦

[@CraftFarmer]

1100 PPFD at top of canopy and 700 inside. Go look at my most recent video, I think you will have a change of opinion.

[@petercsigo3314]

Stop wasting your time with this stuff.

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@lgphato2115]

Science is not on your side.

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@thedank4313]

It looks like a waste 3 feet of leg

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@thedank4313]

Why would you veg so long to have 3 feet of legs that you’re going to get nothing out of? It seems like a waste of grow time.

[@CraftFarmer]

14 day veg from clone

[@CraftFarmer]

Watch the most recent video the legs fill out fully just like the top of the plant

[@AfterDark6]

Lmao this is just nonsense.

[@CraftFarmer]

Go look at my most recent video, I think you will have a change of opinion.

[@michaelmckinney401]

Uf i ever can afford a place i can have a 10x,10 tent, ill do like you all and light the bottom like you did there and the leds at the top, u have to get bigger bottom buds and better too hard w more weight and that blue will also reach into the top.. tgeyll tell you what they can handle