DIY with Quantum Boards

BobCajun

BobCajun

Well-Known Member
I found this part of the patent interesting;

"[0007] For example, page 88 of “Plant Factories Theory
and Practice,” Written by Masamoto Takatsuji, discusses the
light directed at plants, and states that When light is pulsed
(emitted intermittently, so that there is a dark period), the
amount of photosynthesis per unit of light can be increased
over that achieved With continuous light, without optical
saturation occurring even under intense light."

Even if the only benefit was prevention of light saturation it would be very helpful. You could use a lot higher wattage without saturation, at least in theory. There must be a limit though, I'm sure.
 
pop22

pop22

Well-Known Member
I've done test grows for Optic Foliar. I'm not a big believer in such things, but I did have good results on plants under cob lighting that had maxed out the organic soil's ability to supply enough nutrients ( IMO ). Using the Optic spray had them returning to good color withing 3-5 days. I now keep it around just for plants showing nutrient deficits.

Stephenj37826 said:
Interesting...... Can you link the study. In this study did they us equal delivered light? I do think a big limiting factor is the plants ability to get nutrients required for photosynthesis replenished as rapidly as they are used in higher ppf situations making me think that the vascular system of the plant is the bottle neck. I've heard certain foilar applications can help replenish these nutrients during the lights on time after the plant seems to be spent. I have a tester who swears by optic foilar. He's sent me pics and after application at 6 hrs into lights on the plants pray to the light once again just like at lights on......
Click to expand...
 
pop22

pop22

Well-Known Member
Board stats still not on HGL site for the QB288, page is confusing with the QB304 stats posted below the mention of the QB288
 
lukio

lukio

Well-Known Member
BobCajun said:
I found this part of the patent interesting;

"[0007] For example, page 88 of “Plant Factories Theory
and Practice,” Written by Masamoto Takatsuji, discusses the
light directed at plants, and states that When light is pulsed
(emitted intermittently, so that there is a dark period), the
amount of photosynthesis per unit of light can be increased
over that achieved With continuous light, without optical
saturation occurring even under intense light."

Even if the only benefit was prevention of light saturation it would be very helpful. You could use a lot higher wattage without saturation, at least in theory. There must be a limit though, I'm sure.
Click to expand...
Super interesting - thanks (:
 
greg nr

greg nr

Well-Known Member
Ok, so for 2 x QB288's, is a constant voltage ( HLG-240/320H-54B) or constant current (HLG 240/320h-c2800B) driver the better choice?
 
GardenGuy

GardenGuy

Well-Known Member
ttystikk said:
A constant voltage driver might push too much power to your chips in some circumstances.

Did you read the definitions?
Click to expand...
"A constant current driver varies the voltage across the electronic circuit in order to keep and maintain a constant electrical current."

what's wrong with that?

anyway @ttystikk you guys know far more led and grow stuff than me and that's for sure. i just felt like i wanted to help a friend grower.
 
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greg nr

greg nr

Well-Known Member
GG, no harm, no foul. Both styles of drivers will work if spec'd properly. I'm just asking which would be the better driver for these new boards.
 
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GardenGuy

GardenGuy

Well-Known Member
So i'm designing my grow tent and i feel like going for the QB304.

20"x40"x6ft tall tent. i want to stay cool and efficient, not to push any board to its limits, so do you believe 3 QB304 would be enough for me at 250w?

thanks!

@greg nr I really shoudn't have interfered cause i'm just building up my first grow. i may have watched all Growmou5 videos, but i'm a blind noob anyways. peace bro!
 
sixstring2112

sixstring2112

Well-Known Member
greg nr said:
GG, no harm, no foul. Both styles of drivers will work if spec'd properly. I'm just asking which would be the better driver for these new boards.
Click to expand...
You could treat these smaller boards like 50v cobs and find the best driver for your situation. I would use the hlg 240-1400ma and wire in series for lower power boards but higher lpw/eff.
These smaller boards look good to me @1400ma based on the charts
 
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