Side or under canopy lighting?

MAGpie81

MAGpie81

Well-Known Member
ÒÒlegilizeitÒÒ said:
Still bright everywhere, may be not direct, and only reflected light, but the under side of the canopy is actually bright and visible now. This has to give some improvement on photosynthesis
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It does. I forget which episode but a scientist talked about it in an interview on Cannabis Cultivation and Science podcast.
He also said that overcast days spur more photosynthesis among all of the leaves (as opposed to some doing most of it) due to the light refracting through water molecules and reflecting from a broader area. It’s why some lights are better at penetrating canopies- they are less focused on intensity to one direction, and allow the light to disperse, which causes more of chance it will reflect off of something and penetrate further.
You probably already know this.
So, yeah, I think with all of the reflective surfacing you have plus the fact the light will initially be passing up through the plants’ cells, you should see a more than subtle effect on growth- I’d hope.
 
lusidghost

lusidghost

Well-Known Member
MAGpie81 said:
It does. I forget which episode but a scientist talked about it in an interview on Cannabis Cultivation and Science podcast.
He also said that overcast days spur more photosynthesis among all of the leaves (as opposed to some doing most of it) due to the light refracting through water molecules and reflecting from a broader area. It’s why some lights are better at penetrating canopies- they are less focused on intensity to one direction, and allow the light to disperse, which causes more of chance it will reflect off of something and penetrate further.
You probably already know this.
So, yeah, I think with all of the reflective surfacing you have plus the fact the light will initially be passing up through the plants’ cells, you should see a more than subtle effect on growth- I’d hope.
Click to expand...
The Earth isn't a star, and the underside of a leaf isn't the topside. If you clean out the scraggle you'll have the same amount of light. I had virtually no larf on my last run. Dense buds all the way down to where they were lollipopped. I defoliated fairly heavy, but what mostly opened it up was cutting off all of the little side branches. Light is great, but air flow is also great. You're really just adding extra heat and the potential of frying their soft underbellies.
 
ҖҗlegilizeitҗҖ

ҖҗlegilizeitҗҖ

Well-Known Member
lusidghost said:
The Earth isn't a star, and the underside of a leaf isn't the topside. If you clean out the scraggle you'll have the same amount of light. I had virtually no larf on my last run. Dense buds all the way down to where they were lollipopped. I defoliated fairly heavy, but what mostly opened it up was cutting off all of the little side branches. Light is great, but air flow is also great. You're really just adding extra heat and the potential of frying their soft underbellies.
Click to expand...
We sure will see haha
 
MAGpie81

MAGpie81

Well-Known Member
lusidghost said:
The Earth isn't a star, and the underside of a leaf isn't the topside. If you clean out the scraggle you'll have the same amount of light. I had virtually no larf on my last run. Dense buds all the way down to where they were lollipopped. I defoliated fairly heavy, but what mostly opened it up was cutting off all of the little side branches. Light is great, but air flow is also great. You're really just adding extra heat and the potential of frying their soft underbellies.
Click to expand...
I’ve had an LED bulb under an autoflower (in flower) in my greenhouse for a week now. It comes on in the middle of the night. I’m sure my plant enjoys the extra warmth. I have an auto next to it with no light below. It is less bushy and seems less mature than the one with the light.
I never said plants evolved to receive light from underneath, but let me ask- do you use reflective material in your grow? If so- why?- only the light from directly above out of a bulb or the sun would make a difference because the topside of the leaf is where photosynthesis happens, right?
I’m sure your defoliation techniques help you achieve your goal. Is it the only way?
I like experimenting and support others who do as well. I’ve definitely had some silly ones.
I hypothesize that added light from any direction is going to increase photosynthesis in plants.
Perhaps one would try putting a light shining from under their plant during flower when it is “darkout” time. Shouldn’t affect photosynthesis in the topside of the leaf, right?
You make good points. Happy growing bongsmilie
 
S

Stomate

Active Member
MAGpie81 said:
I’ve had an LED bulb under an autoflower (in flower) in my greenhouse for a week now. It comes on in the middle of the night. I’m sure my plant enjoys the extra warmth. I have an auto next to it with no light below. It is less bushy and seems less mature than the one with the light.
I never said plants evolved to receive light from underneath, but let me ask- do you use reflective material in your grow? If so- why?- only the light from directly above out of a bulb or the sun would make a difference because the topside of the leaf is where photosynthesis happens, right?
I’m sure your defoliation techniques help you achieve your goal. Is it the only way?
I like experimenting and support others who do as well. I’ve definitely had some silly ones.
I hypothesize that added light from any direction is going to increase photosynthesis in plants.
Perhaps one would try putting a light shining from under their plant during flower when it is “darkout” time. Shouldn’t affect photosynthesis in the topside of the leaf, right?
You make good points. Happy growing bongsmilie
Click to expand...
So how’d compare to the non under-lit at chop?
 
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