Quantum Boards 3000K 80 CRI vs 3000K 90 CRI

[Evil-Mobo]

Thanks for the info evil-mobo ...i am planing on diy...so lets say i start in the bucket...the thing i am worried about is what do to with the runoff from the first watering, do i just leave it there?cause it will take them i estimate 7-10 days till the roots reach the bottom and i grow in dirt so i'm a bit worried it would make a nice nesting place for all sorts of pests

I water my bucket til runoff outside prior to first use. Then plant/transplant into it. Since the roots are not yet established you should not need to water more than once maybe twice the roots go looking for the water, and the wick is bringing it up, if you need to water in my exp most of the soil is still wet down below so you won't be watering to run off at least I don't. IF you run the DIY outdoors the water will come out of the overflow holes if you over do it so no big deal either.

It's a simple design and it works. I do not want to take the Capt's thread off track on him, so if you want send me a message or post in one of my threads and I would be happy to discuss the DIY with you. We also have a thread about the DIY and commercial systems being discussed here:

https://www.rollitup.org/t/sip-thread-sub-irrigated-planter.904886/

 

[waynejohn]

Thanks i will PM you about the details
Big respect to you and captain for these light test i'm following both and best of luck

 

[captainmorgan]

Start of day 7, the 90 CRI plant 37" has passed the 80 CRI plant 36" in height and the leaves are also 1" longer from stem to tip. The plants frames are close but the 90 CRI plants larger leaves make it look bigger, both getting 875 umoles. I'll move the lights up tonight a bit and need to come up with a defoliation strategy. I usually take all the large fans at the nodes about this time but I do have the option of taking the same amount of veg weight in leaves off both plants, leaning towards my usual strategy.


80 CRI




90 CRI

 

[captainmorgan]

Thought I should check root development while I was at it. I number my clones coming out of the aero cloner based on development, these two clones were number 1 and 2 but close to the same, number 2 had a slightly larger diameter stem. The number 1 is under the 90 CRI light, flipped a coin for which plant got which light. The 90 CRI plant has a lead in root development so far but not sure if it's CRI dependent. They share a larger res so they both take what they need.


80 CRI




90 CRI

 

[ThatSpudGuy]

Looking good mate im subbed anyway

 

[captainmorgan]

Reset the lights for 700 umoles at the tops.

 

[BuddyColas]

Thought I should check root development while I was at it. I number my clones coming out of the aero cloner based on development, these two clones were number 1 and 2 but close to the same, number 2 had a slightly larger diameter stem. The number 1 is under the 90 CRI light, flipped a coin for which plant got which light. The 90 CRI plant has a lead in root development so far but not sure if it's CRI dependent. They share a larger res so they both take what they need.


80 CRI

View attachment 3959765


90 CRI

View attachment 3959766

Interestingly, in the Dawg's 80/90 comparison grow the 90 roots outperformed the 80 roots by far...like yours!

 

[captainmorgan]

Interestingly, in the Dawg's 80/90 comparison grow the 90 roots outperformed the 80 roots by far...like yours!

Did he have a leaf size difference like mine?

 

[BuddyColas]

Did he have a leaf size difference like mine?

Looking back, I don't see a leaf length comparison...but the 90 "bush" was hands down the winner.
https://www.rollitup.org/t/dhp-presents-citizen-cob-1812-3500k-80cri-vs-1812-3500k-90-cri.932990/page-3

It seems like the 90 has more of what a plant wants. Just a thought, but when you make the PAR readings equal between the two lamps, more of the 90's radiation lies outside of the PAR window uncounted...so the 90 plant is getting more total photons.

 

[captainmorgan]

Looking back, I don't see a leaf length comparison...but the 90 "bush" was hands down the winner.
https://www.rollitup.org/t/dhp-presents-citizen-cob-1812-3500k-80cri-vs-1812-3500k-90-cri.932990/page-3

It seems like the 90 has more of what a plant wants. Just a thought, but when you make the PAR readings equal between the two lamps, more of the 90's radiation lies outside of the PAR window uncounted...so the 90 plant is getting more total photons.

Still too early for me to come to any conclusions. The 90 does have more spectrum outside 700 nm but it may be more about the ratios. The leaf size difference is very noticeable but doesn't necessarily mean flower production will be larger too, same with the roots. I've had plants fill a res with roots and yield big and I've had plants without a lot of roots in the res yield big. Cannabis seems to produce way more leaf matter than needed and I believe defoliation can actually increase yield so I'm not sure leaf size is that important yet. More plant matter in stems,roots and leaves may not mean more flower automatically, there may be a ratio where above a certain point it's wasted energy building it.

 

[BuddyColas]

Still too early for me to come to any conclusions. The 90 does have more spectrum outside 700 nm but it may be more about the ratios. The leaf size difference is very noticeable but doesn't necessarily mean flower production will be larger too, same with the roots. I've had plants fill a res with roots and yield big and I've had plants without a lot of roots in the res yield big. Cannabis seems to produce way more leaf matter than needed and I believe defoliation can actually increase yield so I'm not sure leaf size is that important yet. More plant matter in stems,roots and leaves may not mean more flower automatically, there may be a ratio where above a certain point it's wasted energy building it.

You are right. In the end, she who has the most buds wins! And who finishes first would factor in also. Great following along.

 

[captainmorgan]

You are right. In the end, she who has the most buds wins! And who finishes first would factor in also. Great following along.

This post made me realize I forgot to add that I'm using 730 nm flower initiators at lights out in the set ups at 12/12. Guess I've been using it so long I think of it the same as a fan, just part of my set up.

 

[captainmorgan]

Using flower initiators may negate any noticeable differences in flower time caused by the different CRI.

 

[BuddyColas]

Using flower initiators may negate any noticeable differences in flower time caused by the different CRI.

Good point. It will be interesting to see when each finishes...in that they have both been exposed to 730nm at lights off.

 

[captainmorgan]

The plants are growing 2"+ a day now, good thing there is only another week of heavy stretch.

 

[captainmorgan]

Plants are still blowing up so I had to move the lights up again. It's almost lights out so I set them at 650 umoles, I'm sure it will be at least 700 umoles at the top by lights on. Took a quick measurement on the 90 CRI plant, 41" already, I'll post some pics tomorrow.

 

[captainmorgan]

Lights on at noon for day 10 and 725 umoles at the tops. The 80 CRI plant is 40" tall and the large fans are 7" from stem to tip. The 90 CRI plant is 41.5" tall and the large fans are 8" from stem to tip. Need to do a cleanup soon.

80 CRI



90 CRI

 

[captainmorgan]

Did some clean up on the girls. Took 110 grams of large fans off the 80 CRI plant and 125 grams off the 90 CRI plant. Pretty similar job on both so the leaf size accounts for the difference in weight.

 

[captainmorgan]

Stretch has slowed at the start of day 13 and 775 umoles at the tops, 80 CRI plant is 42" and the 90 CRI plant is 44".

80 CRI plant



90 CRI plant

 

[captainmorgan]

Day 18 for the CunFusions, had my PH go low in the big res but got it adjusted. Keeping the tops at 800 umoles now that the stretch is pretty much over. The 90 CRI plant is now 45" and the 80 CRI plant is 43" tall.

90 CRI



80 CRI