Why can’t I run my light on full power ts1000

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Mrbignugs

Well-Known Member
These leaves were praying 3 hours ago lol only these two are effected tho other one still praying loves it.nothing eles just a slight droop seems to happen about 2-3 hours before lights off would that not point to the DLI ?
 
StareCase

StareCase

Well-Known Member
Mrbignugs said:
... just a slight droop seems to happen about 2-3 hours before lights off would that not point to the DLI ? ...
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Without any supplemental CO2, weed plants can handle a DLI of between 40 - 45 moles. I adjust my lighting to pump out between 42 and 43 moles per day. 43 moles ~ 2,589,460,000,000,000,000,000,000 photons per day. 420 watts of light do not exceed that 43 mole mark so I doubt that a 150 watt light would.

I reckon that gentle sagging is the plants going into their "bedtime routine". About 90 minutes before their lights out time, the leaves sag and she looks a little droopy. She is preparing for her light source to temporarily go away. But once the lights come back on she has perked up and is back to reaching for the light.

Sounds like normal plant stuff.
 
Week4@inCharge

Week4@inCharge

Well-Known Member
Mrbignugs said:
These leaves were praying 3 hours ago lol only these two are effected tho other one still praying loves it.nothing eles just a slight droop seems to happen about 2-3 hours before lights off would that not point to the DLI ?
Click to expand...
Mrbignugs said:
These leaves were praying 3 hours ago lol only these two are effected tho other one still praying loves it.nothing eles just a slight droop seems to happen about 2-3 hours before lights off would that not point to the DLI ?
Click to expand...
StareCase said:
Without any supplemental CO2, weed plants can handle a DLI of between 40 - 45 moles. I adjust my lighting to pump out between 42 and 43 moles per day. 43 moles ~ 2,589,460,000,000,000,000,000,000 photons per day. 420 watts of light do not exceed that 43 mole mark so I doubt that a 150 watt light would.

I reckon that gentle sagging is the plants going into their "bedtime routine". About 90 minutes before their lights out time, the leaves sag and she looks a little droopy. She is preparing for her light source to temporarily go away. But once the lights come back on she has perked up and is back to reaching for the light.

Sounds like normal plant stuff.
Click to expand...
I 2nd this, seen this before, all normal. Ladies looking good otherwise. Which strain are these?
 
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Mrbignugs

Well-Known Member
Good vid :hump: love the intro lol they are all fast buds autos top left is star dog top right is wedding cheesecake and the big girl upfront is wedding glue also the light is @ 20” now not 28+ and as for a fan I have an intake sucking in from outside blowing down through the canopy but not an actual fan don’t have the space lol
 
PopAndSonGrows

PopAndSonGrows

Well-Known Member
It's a new channel i started watching, he's also doing a "youtuber grow style" series where he's replicating the grow styles of like 5 different channels. It's pretty awesome IMO.
 
D

Delps8

Well-Known Member
Mrbignugs said:
Hi guys as title states I have 3 autos in a 2x3 they are 35 days from sprout all in the start of flower 2 @ 2 weeks and 1 @ 1 week or so but my question is until about a week ago all was fine still is except from I noticed that the plants were dropping a few hours before lights off they were on 20/4 so switched to 18/6 for more rest anyway I got looking into Dli an figure that was the problem too much light over too long a timeframe but surly a 150w led isn’t too much light it’s on about 80% atm @ 28 inches and plants seem a lot happier 500ish ppfd @ canopy any thoughts guys thanks :mrgreen::joint:
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Think of a PPFD of 500 µmols as the minimum that you should provide cannabis plants once they're into veg That PPFD for 18 hours is a DLI of only 32 mols. Cannabis grows outdoors where PPFD will hit 2000 µmols with DLI's approaching 60 mols so it can absorb and use a tremendous amount of light. The light saturation point (in a non-CO@ environment) for cannabis is 900µmols and there's very little variance from one cultivar to another.

If you want to maximize yield, make sure the other components of your grow environment are sound and raise the light level to 900µmols. If you see light avoidance (plants turning on the axis of their petiole so as to avoid light) or if there's tacoing/canoeing, reduce the light levels by 10% until the symptoms disappear. It takes prolonged over exposure to cause bleaching.

If you see your plants "praying" that's a good sign - they're stretching to receive light. I've got pix of my grows praying and I use the caption "If they were any happier, they'd have to get a room."

I started growing (again) in early 2021 and it

Plants drooping at night is not an indicator of too much light. One cause for that is that the plant is done generating auxin, a growth hormone.
 
D

Delps8

Well-Known Member
StareCase said:
Without any supplemental CO2, weed plants can handle a DLI of between 40 - 45 moles. I adjust my lighting to pump out between 42 and 43 moles per day. 43 moles ~ 2,589,460,000,000,000,000,000,000 photons per day. 420 watts of light do not exceed that 43 mole mark so I doubt that a 150 watt light would.

I reckon that gentle sagging is the plants going into their "bedtime routine". About 90 minutes before their lights out time, the leaves sag and she looks a little droopy. She is preparing for her light source to temporarily go away. But once the lights come back on she has perked up and is back to reaching for the light.

Sounds like normal plant stuff.
Click to expand...
Check out Bugbee and Chandra and others - I've attached a few documents. 45 mols is bandied about on a lot of sites but it's not backed up by research that I can find. I suspect a popular source is from the company that sells Photone. I've tested Korona/Photone and traded email with their programmer. I asked him for the source behind the graphic on their site (both the old one and the new one are attached) and he said that their graphics are based on footnotes. Check the footnotes and they're not linked to verifiable research.

Also, there's no indication in any research that I can find to indicate that there's any need to gradually ramp up light levels. Bugbee addressed this in one of his videos. Paraphrasing, he said that they've taken cannabis from 400 µmols to 1200 µmols in a couple of days with no ill effects.

I've attached a graph of light levels for my last grow. The grow was two Gorilla Glue autos, Chris and Wilma. Wilma was named after Wilma Rudolph. Check out her bio on the Wiki and you'll see why I named her that. Like her namesake, Wilma had problems as a seedling and didn't do well with high light levels until very close to the end of the grow.

DLI was stepped down toward the end of flower. That's by design and I did that for the simple reason that there was no reason to run my lights that high — the plants were so large that it was pointless to keep my light running at 320 watts. The grow yielded 590 gm from Chris and 139 gm from Wilma. IIRC, one cola was 16" long.

I do an "after action review" for each grow. Here are the notes on lighting from the AAR for my last grow. That's the lighting plan for my next grow.

1661579273264.png



1661578956641.png
 

Attachments

Week4@inCharge

Week4@inCharge

Well-Known Member
Delps8 said:
Check out Bugbee and Chandra and others - I've attached a few documents. 45 mols is bandied about on a lot of sites but it's not backed up by research that I can find. I suspect a popular source is from the company that sells Photone. I've tested Korona/Photone and traded email with their programmer. I asked him for the source behind the graphic on their site (both the old one and the new one are attached) and he said that their graphics are based on footnotes. Check the footnotes and they're not linked to verifiable research.

Also, there's no indication in any research that I can find to indicate that there's any need to gradually ramp up light levels. Bugbee addressed this in one of his videos. Paraphrasing, he said that they've taken cannabis from 400 µmols to 1200 µmols in a couple of days with no ill effects.

I've attached a graph of light levels for my last grow. The grow was two Gorilla Glue autos, Chris and Wilma. Wilma was named after Wilma Rudolph. Check out her bio on the Wiki and you'll see why I named her that. Like her namesake, Wilma had problems as a seedling and didn't do well with high light levels until very close to the end of the grow.

DLI was stepped down toward the end of flower. That's by design and I did that for the simple reason that there was no reason to run my lights that high — the plants were so large that it was pointless to keep my light running at 320 watts. The grow yielded 590 gm from Chris and 139 gm from Wilma. IIRC, one cola was 16" long.

I do an "after action review" for each grow. Here are the notes on lighting from the AAR for my last grow. That's the lighting plan for my next grow.

View attachment 5188087



View attachment 5188085
Click to expand...
Woah... I'm gonna have to grab my morning coffee and read this again. Thanks for the write up. Sounds like less is more? I usually cap it off at 36-38DLI. Don't use C02. My last winter grow I did notice the lower canopy blooming just as well as the top canopy, the lower sitting at about 750-800 vs the top at 950-1000 (<---edited) interesting interesting... Gonna perk that coffee up, thanks for the read!
 
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Week4@inCharge

Week4@inCharge

Well-Known Member
Delps8 said:
Think of a PPFD of 500 µmols as the minimum that you should provide cannabis plants once they're into veg That PPFD for 18 hours is a DLI of only 32 mols. Cannabis grows outdoors where PPFD will hit 2000 µmols with DLI's approaching 60 mols so it can absorb and use a tremendous amount of light. The light saturation point (in a non-CO@ environment) for cannabis is 900µmols and there's very little variance from one cultivar to another.

If you want to maximize yield, make sure the other components of your grow environment are sound and raise the light level to 900µmols. If you see light avoidance (plants turning on the axis of their petiole so as to avoid light) or if there's tacoing/canoeing, reduce the light levels by 10% until the symptoms disappear. It takes prolonged over exposure to cause bleaching.

If you see your plants "praying" that's a good sign - they're stretching to receive light. I've got pix of my grows praying and I use the caption "If they were any happier, they'd have to get a room."

I started growing (again) in early 2021 and it

Plants drooping at night is not an indicator of too much light. One cause for that is that the plant is done generating auxin, a growth hormone.
Click to expand...
Great advise here. Quick question. The study was done purely in the vegative stage, would you recommend the 500 minimum and 900 max at the flowering stage? As you know everything is always honky dory during veg...but week 4 into flowering.... ouch.
 
D

Delps8

Well-Known Member
Week4@inCharge said:
Great advise here. Quick question. The study was done purely in the vegative stage, would you recommend the 500 minimum and 900 max at the flowering stage? As you know everything is always honky dory during veg...but week 4 into flowering.... ouch.
Click to expand...
"everything is always hunky dory during veg" - :-)

The seedling stage is the only time I wouldn't shoot for 900µmols. My lighting plan for my next grow, Chris being the bigger plant in my last grow:

1661626942033.png
 
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