Can someone explain 80 CRI vs 90 CRI- LED

linky

linky

Well-Known Member
Rahz said:
Absolutely, there will be a long detailed post eventually with pics from all stages and final numbers. I've invested quite a bit in making it happen and am very curious myself. Everything is tightly controlled down to the amount of water circulation through each container, driver currents equalized, etc. There will be enough clones to choose healthy samples with equal root growth and multiple plants under each light. If the 70 CRI sample performs as it did on paper then I think and hope people should take a look at that and consider whether there is bias in their current choices. If yields deviate from the expected result then things will continue to be ambiguous. Which wouldn't be a bad thing.

I'm almost certain there will be morphological differences but I've only grown under 2 of the 5 samples so that will be interesting to document. I'll look forward to seeing what you come up with as well.
Click to expand...

That will be a great test and interested to see the results.. would have to do multiple rounds though to get a more accurate conclusion, as we all know there is always variation from one crop to another.
 
hillbill

hillbill

Well-Known Member
Color rendering index is not meaningful in itself in our application. What makes it helpful with white LEDs is that the spectrum usually shifts to more and deeper reds at 90 cri over say 80 cri in phosphor white leds.

Higher cri rating Lights from other sources may have far different spectrums as far as humans perceive the color of an object than white leds.

I actually do run 80 and 90 cri COBs at 3500k and that 90 cri is a bud grower!
 
Psyphish

Psyphish

Well-Known Member
Any pre-built fixtures being sold with 90 CRI COBs? I was going to get something from Timber, but I don't think they use 90 CRI?
 
P

Photon Flinger

Well-Known Member
MiStUrX said:
How much better is it hillbill?

I just bought 8 cxb3590s at 80 CRI, always learn the hard way.
Click to expand...

You can add some 90s to your setup if you want. Nothing wrong with the 80s.

I am finishing up a test using Vero 29 SE 3000k 80/90/80+90mix with 3 strains and things turned out very interesting:

Sativa stretch under the 90 more than 80 only or 80/90 mix.
Indica stayed short under 80 but stretched more with 90 and 80/90 mix.
Hybrids were slightly more stretchy under 90 and 80/90 mix.

Also I am using PWM drivers to run the Vero 29 SE, that being a modulated current instead of a stable DC current, to the cob. From what I can tell so far, that is best way to get the most out of LED tech so folks might want to look into it. I even see on meanwell's website that they have PWM capable drivers or modules that you can add inline to use PWM for dimming. Maybe someone else can chime in.
 
hillbill

hillbill

Well-Known Member
MiStUrX said:
How much better is it hillbill?

I just bought 8 cxb3590s at 80 CRI, always learn the hard way.
Click to expand...
I'm not ditching my 80 cri at all and efficient COBs are far and away better than anything else. We are at a spot where differences are small and the cxb3590 80 cri works as well as it ever has. Postings on RIU confirm the reputation and abilities of this cob. It is the cob that changed everything!..........carry On!
 
Hybridway

Hybridway

Well-Known Member
It's been tested n proven. 90+ CRI rocks. Been growing under 95 CRI for the past year.
If you put equal Oooohmoles of 70,80,90 (cob efficiency aside) & 95cri/enhanced white you'll see the difference in growth.
Problem here I think is everyone's only concern is efficiency vs plant reaction, trying to compare white only sources. Obviously if you're going to do that, 80 is your middle ground. Take it a few steps further by adding the right combination of monos (to blend), then you can achieve high CRI w/o sacraficing efficiency.
 
Last edited:
Psyphish

Psyphish

Well-Known Member
Hybridway said:
It's been tested n proven. 90+ CRI rocks. Been growing under 95 CRI for the past year.
If you put equal Oooohmoles of 70,80,90 (cob efficiency aside) & 95cri/enhanced white you'll see the difference in growth.
Problem here I think is everyone's only concern is efficiency vs plant reaction, trying to compare white only sources. Obviously if you're going to do that, 80 is your middle ground. Take it a few steps further by adding the right combination of monos (to blend), then you can achieve high CRI w/o sacraficing efficiency.
Click to expand...
It's why I still haven't bought a COB fixture, they're just not as good as 315w CMHs. Maybe some day...
 
RainDan

RainDan

Well-Known Member
Psyphish said:
Any pre-built fixtures being sold with 90 CRI COBs? I was going to get something from Timber, but I don't think they use 90 CRI?
Click to expand...
Hi @Psyphish

Thanks for your post - we do offer 90 CRI COBs in our 3000K Cree CXB3590 and Vero29 products. It is a special request item - no additional charge.

Hope this helps.

Best Regards,
Dan
 
shiva71

shiva71

Well-Known Member
Was thinking about this thread and I thought why not mix 90CRI@5000k and [email protected] truly an utter novice in this matter but wouldnt you be maximising the red/blue output if you had this configuration?
 
You must log in or register to reply here.
Top