Quantum Boards 3000K 80 CRI vs 3000K 90 CRI

[Growcob5]

I got 1212 ther runing at 40watt. I got 8chips i got to put a sun bord in that ps i got to see but i think cheep cob full spaks on ebay will help 400to850 ther shit that cob wood hever more help whith theezz full spek redish chips

 

[CobKits]

The 80 CRI plant is definitely carrying more weight.

i wonder if, because you said you adjusted the umols at the plant the same, that the 90 got over stressed (from the extra non-measured light)

 

[BuddyColas]

i wonder if, because you said you adjusted the umols at the plant the same, that the 90 got over stressed (from the extra non-measured light)

I'm not saying light stress is the cause of this un expected result...I'm just agreeing that the 90 got about 15% or so more photons than the 80. FYI...before the latest 90cri rage, many said 3000/80 was the sweet spot. Just saying.

 

[captainmorgan]

i wonder if, because you said you adjusted the umols at the plant the same, that the 90 got over stressed (from the extra non-measured light)

That's one possibility along with the color ratios. I wouldn't of thought that at 800 umoles the plant would be overwhelmed by the amount of light it was getting without additional CO2, but it sure looks that way. I suspect it is a combo of the two, added spectrum outside my measuring range plus the spectral shift. As always some of this could be strain related to the plants tolerance and metabolism.

 

[OLD MOTHER SATIVA]

so far with cobs or single chip eds..anytime i had yellowing or not pretty leaves
i raised the lights and they got green again...fast

 

[CobKits]

i notice my plants sometimes cower and hide from blurples because of the massive amount of red they throw down. red light packs a punch for sure

 

[CobKits]

maybe par isnt the best measure. maybe constant wattage at a given height and then its just straight spectrum comparison

 

[Rahz]

PAR watts is a pretty fair way to compare spectrums... straight watts is probably better as long as we're talking same brand/chip. It might give low K/CRI a slight flux advantage but that would be the point. Watts in, grams out.

 

[thetr33man]

watching

 

[cdgmoney250]

What were the canopy/ambient temps? My guess is the VPD was too high. 800 umoles isn't too much light at that stage in flower.

 

[captainmorgan]

i notice my plants sometimes cower and hide from blurples because of the massive amount of red they throw down. red light packs a punch for sure

I just added 50 watts of reds to my 550 watt 3000k 80 CRI QB vertical setup, 50/50 of XP-E2 630 nm and XP-E 660 nm. I'll be keeping a closer eye on that setup but I'm running that scrog around 500 umoles before adding the reds, need to take some new readings.

 

[captainmorgan]

What were the canopy/ambient temps? My guess is the VPD was too high. 800 umoles isn't too much light at that stage in flower.

Pretty consistent low 80's at the canopy.

 

[cdgmoney250]

Pretty consistent low 80's at the canopy.

What about RH%?

 

[captainmorgan]

What about RH%?

50

 

[captainmorgan]

The 90 plants leaves seem to be in the 1.5 to 2 degrees F less than the air temp at the canopy.

 

[nfhiggs]

It is all about about the amount of photosynthetic usable photons

No, not really. If we were harvesting oxygen from our plants that would absolutely be true, but we are harvesting THC. Plants are far more complex, with many light driven processes occurring that do not involve photosynthesis - many of these processes are not even yet understood at a biochemical level.

 

[RandomHero8913]

I just added 50 watts of reds to my 550 watt 3000k 80 CRI QB vertical setup, 50/50 of XP-E2 630 nm and XP-E 660 nm. I'll be keeping a closer eye on that setup but I'm running that scrog around 500 umoles before adding the reds, need to take some new readings.

How did you end up attaching the stars to your rig?

 

[captainmorgan]

How did you end up attaching the stars to your rig?

Drilled and tapped holes for BJB solderless holders into a 80/20 1 1/2" square tube with 1/8" walls.

 

[RandomHero8913]

Drilled and tapped holes for BJB solderless holders into a 80/20 1 1/2" square tube with 1/8" walls.

That is one good looking setup. Keep up the good work Cap.

 

[legalcanada]

taking a seat