DHP Presents Citizen Cob 1812 3500k 80CRI Vs 1812 3500k 90 CRI

1KTrees

1KTrees

Member
The Dawg said:
Just When You Thought You Were 90 Cri They Pull Me Back With The Vero Angles 4000k 80 Cri On The Ends With The Vero29 5000K 80 Cri With 16 Watts Of 730nm Gracing The Center :hump: Peace And Break It Down Tina :hump:


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Your side by side is interesting. I think the only thing it proved was that 90 cri vegged much better than the 80 cri. With better root structure and size in veg you are bound to get bigger nugs right?
 
The Dawg

The Dawg

Well-Known Member
1KTrees said:
Your side by side is interesting. I think the only thing it proved was that 90 cri vegged much better than the 80 cri. With better root structure and size in veg you are bound to get bigger nugs right?
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Oh Btw This Is My 5x5 With My Beloved Vero Angels :hump:
 
1KTrees

1KTrees

Member
The Dawg said:
Nope If You Go Back To The Beginning Of Page 1 You will See That Both Plants Vegged The Same And It Wasn't Until The Second Week Of Flower That The 90Cri Plant Started Taking The Lead :peace:
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Ok it was a little confusing around page 4. You showed the 90 cri bigger than the 80 cri but You said something like we will know in 10 weeks. Well damn that is a big difference between the two cri.
 
kunkgrow

kunkgrow

Active Member
I don't know if it explains but there is a massive R9 difference from 80 CRI to 90 CRI
From the data sheet:
For 80 CRI minimum LEDs, CRI R9 minimum is 0 with a ±2 tolerance. For 90 CRI minimum LEDs, CRI R9 typical is 60.
 
kunkgrow

kunkgrow

Active Member
I work with architectural lighting design and in my field there is a company called Soraa. They developed a different kind of LED that uses Gallium Nitride instead of phosphorus enabling Soraa LEDs to emit violet light, where traditional LEDs emit blue light. This allows Soraa LEDs to render all colors of the spectrum with accuracy. If you see their R9 chart all above 95 for their high CRI line. I wonder if it is Emerson effect at play here and the importance of specific reds .
 
Randomblame

Randomblame

Well-Known Member
diogodasilva said:
I work with architectural lighting design and in my field there is a company called Soraa. They developed a different kind of LED that uses Gallium Nitride instead of phosphorus enabling Soraa LEDs to emit violet light, where traditional LEDs emit blue light. This allows Soraa LEDs to render all colors of the spectrum with accuracy. If you see their R9 chart all above 95 for their high CRI line. I wonder if it is Emerson effect at play here and the importance of specific reds .
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Any datasheet available? I've read something about Soraa and they should be really efficient too. Maybe PM me because I don't want to hijack this usefull thread.
Waited a long time for such a CRI comparision thread..
Well done, sir!
Like your threads a lot, especially your 5k+730nm...
Never thought to see such a difference.
 
kunkgrow

kunkgrow

Active Member
Randomblame said:
Any datasheet available? I've read something about Soraa and they should be really efficient too. Maybe PM me because I don't want to hijack this usefull thread.
Waited a long time for such a CRI comparision thread..
Well done, sir!
Like your threads a lot, especially your 5k+730nm...
Never thought to see such a difference.
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I still haven't got access to PM, I need to make a certain number of posts to be able to use the private message system , including receiving too, I could e-mail it to you.
 
Randomblame

Randomblame

Well-Known Member
If they really are so good we all might start singing


kunkgrow said:
Missing R9 from common 80CRI LEDs

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Only a matter of time, my friend.
The more you get involved, the faster all functions will be unlocked.
Maybe you are willing to create an own thread about the Soraa purple based led tech. Seems to be very interesting when they deliver the same performance like other brands but with better spectrum quality they are definately worth a try.
 
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kunkgrow

kunkgrow

Active Member
Randomblame said:
If they really are so good we all might start singing




Only a matter of time, my friend.
The more you get involved, the faster all functions will be unlocked.
Maybe you are willing to create an own thread about the Soraa purple based led tech. Seems to be very interesting when they deliver the same performance like other brands but with better spectrum quality they are definately worth a try.
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I have no affiliation.
I thought it was an interesting addition to the thread. R9 isn't special exclusively for Soraa, Luminus has the CXM22 cob with >80 R9 and much better efficiency and OEM form factor
 
Dreddd

Dreddd

Well-Known Member
kunkgrow said:
Sorry if it seems I'm over posting but I'm overwhelmed by this.
http://www.designingwithleds.com/measuring-light-quality-philips-cree-led-bulbs-spectrometer/
Great read to understand how R9 is measured and why spectrum is not everything for saturated colors.
I think it backs up the OP results
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Hey man, i was looking into Soraa a couple of months back, thought about maybe ordering a few lights for testing since they have that gorgeous spectrum, but honestly i just dont think its worth it since their efficiency is so damn low, basically both Soraa and Yuji, produce LEDs that use violet diodes instead of blue diodes, these violet diodes are what contributes to their minimum 98 CRI and extremely high R9 value, but so far every single violet based LED i've found has incredibly low lm/W ratio, between 50-60 lm/W on average, so as much as i want to consider violet based LEDs for growing purposes they're just not efficient enough at the moment to compete with blue based LEDs like the Luminus CXM-22 you mentioned.
 
thetr33man

thetr33man

Well-Known Member
kunkgrow said:
I have no affiliation.
I thought it was an interesting addition to the thread. R9 isn't special exclusively for Soraa, Luminus has the CXM22 cob with >80 R9 and much better efficiency and OEM form factor
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So what is R9 for citizen 1212's and 1818's 90cri? That is what I have been using primarily lately with good results... Is there a table or something giving this info for commonly used cobs? Also interested in how the R9 looks for the gen5 90cri citizens compared to gen6, Im guessing the gen5 will be better looking at the graph.
 
kunkgrow

kunkgrow

Active Member
thetr33man said:
So what is R9 for citizen 1212's and 1818's 90cri? That is what I have been using primarily lately with good results... Is there a table or something giving this info for commonly used cobs? Also interested in how the R9 looks for the gen5 90cri citizens compared to gen6, Im guessing the gen5 will be better looking at the graph.
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They declare a minimum of 50 R9 for the 90cri
 
hillbill

hillbill

Well-Known Member
The light from my Citizen 3500 k 90 cri is warmer than vero 3500k 80 cri. It is visible and similar in difference from 4000k to 3500k in the veros. The pistils always appear more yellow and there is no sense of cool blue at all. All this is subjective and I believe tha cri is meaningless except that in the case of COBs, the higher cri rating is accompanied by the spectral shift to deeper reds. Cri ratings for MH are always higher than HPS but with much lower red output.
 
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