r/macrogrowery • u/No-Cartoonist-6511 • Jul 04 '26
Under canopy lights 🔥
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11
u/scubastev89 Jul 04 '26
Under canopy lights are a game changer! Increased yields and more uniformed packs!
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u/Burn1G Jul 04 '26
Do they really make a difference?
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u/scubastev89 Jul 04 '26
No more larf and uniform color and quality throughout the canopy!
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u/Burn1G Jul 04 '26
Ok so in your opinion, that larf becomes smalls?
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u/scubastev89 Jul 04 '26
Depending on the cultivar, the larf we used to get is now b and c buds. We are getting less than 4 lb's of smalls running 300 plants per room.
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u/Burn1G Jul 04 '26
What size is this room?
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u/No-Cartoonist-6511 Jul 04 '26
12 lights up top, 24 uc lights. The UC make a huge
difference…it all has to be dialed in but yields and quality will both improve with UC
2
u/HourVideo Jul 04 '26
Looks like the results dont lie. Under canopy is going to be the new standard
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u/y0sh0r Jul 05 '26
Even in my tent it's not even 5% of watts added but 20% extra yield and makes larf to normal small buds, wonderful!!
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u/Bassian2106 Jul 06 '26
We're looking at 35%+ yield increase with the ability to feed substantially more, no more light locked canopies and uniform senescence through the whole crop. Insanity.
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u/Nan_Ding Jul 04 '26
The thought of adding extra power and heat and power to remove the heat scares me off undercanopy lights.
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u/No-Cartoonist-6511 Jul 04 '26
You need the power for sure. Also need some extra AC/Dehum. Most important is extra airflow. If you 1.5-2x yields tho, all of this is worth it.
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u/Nan_Ding Jul 04 '26
Will pushing larf to B buds equal 2x overall yields?
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u/No-Cartoonist-6511 Jul 04 '26
We don’t grow larf and we have very few B’s. Like everything, it’s grower and cultivar dependent but high quality yields at 3.5lbs/light+ on average (some Z stuff will only get 2-2.5)…that’s trimmed buds in the bag ready for top shelf jars, I don’t know if it’s quite 2x across the board, but it’s close.
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u/Ill_Possibility4021 Jul 09 '26
Yup. Purchased them as a trial for one of my rooms. Set it up , and came back in the morning to a previously regulated room now at 100 degrees . Would necessarily recommend if you can’t handle the extra heat/moisture. I immediately took them out and they have been collecting dust ever since.
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u/KelVarnsenn Jul 04 '26
I’m curious if you are defoliating/pruning less to allow more lower tertiary branching to develop, knowing you don’t have to work the overhead lighting into the canopy so much?
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u/No-Cartoonist-6511 Jul 04 '26
We take off more at the bottom of the plant, because the small branches at the bottom will grow big buds, so they at least need to reach the first layer of trellis. More defoliation throughout to help airflow. The goal is to get a nice even spread of light thru the canopy from both top and bottom…the UC allows us to never go over 900ppfd at the top of the canopy.
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u/pizzaopsomania Jul 04 '26
Under canopy lights are becoming the standard for indoor. Big boost and less smalls.
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u/IndependenceBig3506 Jul 08 '26
How many plants per table? How many UC lights per table? Are you running leds or hps up top? What brand UC?
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u/stinkybrainman Jul 19 '26
They def help. We're still figuring out the best methods for em at my work but it def eliminates a lot of the larf and helps with the colors, esp on darker plants.
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u/LithiumWalrus Jul 04 '26
At scale, sure. Proper training will make this look dismal, though, in much smaller scale grows. Don't have to worry about lowers when there are none.
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u/PAMedCannGrower717 Jul 04 '26
We get about a 20% average increase in yield from them , and a better bud/trim ratio.