New build: 2700k CRI 90 vs 2000k CRI 65

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Bruno Cencio

Active Member
I'm building a new LED light with 16 x V18 gen7 with those specs, I could go half and half or maybe one is better on every aspect to the other.
So, which one will have more reds, can't find specific wavelenght graph to compare them, anyone with some feedback on those?

Will be much appreciated.
 
10WeekFlushBro

10WeekFlushBro

Well-Known Member
2 rules of LED: Everybody loves to talk about spectrum and nobody wants to do a side-by-side. Well, except researchers at Utah state university, whose work so far is showing that there is no difference in yield between plants grown under 4% or 20% blue. I would just go with 2700K. it's a full cycle light with proper B:R ratio. I'm vegging under 2700K and there is not a damn difference between it and 3500K.

2000K will have lower B:R ratio.
 
Horselover fat

Horselover fat

Well-Known Member
10WeekFlushBro said:
2 rules of LED: Everybody loves to talk about spectrum and nobody wants to do a side-by-side. Well, except researchers at Utah state university, whose work so far is showing that there is no difference in yield between plants grown under 4% or 20% blue. I would just go with 2700K. it's a full cycle light with proper B:R ratio. I'm vegging under 2700K and there is not a damn difference between it and 3500K.

2000K will have lower B:R ratio.
Click to expand...
They showed that the level of bluelight makes no difference in yield nor thc/cbd levels *during flower*.
 
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Bruno Cencio

Active Member
Actually, there is the spectrum data on the datasheet, but cant seem to understand they patterns :weed:


I will be mixing 480w of the most RED (closer to 660nm) with 120w of most efficient blue (440nm) 5000k 70 CRI. For what I can understand my best bet is 2000k 65 CRi asi is got almost the same reds as 2700K 90CRI but is pushing much more efficently the photons compared to the 2700K 90CRI (149lm/w vs 118 lm/w)

And I will be adding some LM351H 660nm and a few 730nm also...

The idea behind is, for Vegging I got ultra efficient blue light, no more than 120w needed, and when flowering the blue spectrum is covered, I think do help to some extent tbh in the final quality of the product...
 
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