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According to HLG their ratios are Red:Green:Blue ratio of 48:32:20. I know CCT is a value for eyes, but as discussed here there seems to be an overwhelming support for more phosphorous in the diodes. 50% 3000k and 50%5000k will give you roughly 4000k CCT?

He was a cool cat! So you agree that using 6500K with enough 660nm is better than using 3500K and lower amount of 660nm diodes? (UV and FR aside) as it is more efficient and will produce a higher quality product? :roll:

According to this spec-sheet of the Diablo X boards, the CCT is 5398K! With that many reds, it seems they are using 6500K diodes? What ever happened to Old Mother Sativa? He used to test the CCT and I think he said he noticed little or no morphologically difference between the two CCTs.

Because with 5000k you are getting the efficiency bump, and by using red diodes the need for warmer white light in my opinion is arbitrary. More red means lower overall CCT anyways... Recent studies show that plants don't care as much about color temperature anyhow, and 437nm diodes are more...

So I'm not at all happy with where this thread has ended in terms of the initial question. My conclusion is still that if you are using 660nm red diodes, you might as well use 5000K H EVO only, or B EVO for double spike blues. If you are using white only then I could see the importance of mixing...

I'm still stuck on the question whether intensity is more important than spectrum when it comes higher production. I remember blasting my plants with excessively high PPM's with the 3000k lm561C diodes when they first hit the market and the results I got were incredible, and so were results...

I'm not sure I quite understand the the science behind that statement, but it is interesting to get different experiences... terpenes, cannabinoids in cannabis, and other edible plants report to be higher under light which leans further towards the violet and into ultraviolet ranges. I.e HLG's...

A full brain... is a scattered one :D Most people who do paid-for research tend to keep that shit private. So I can totally respect that. I think what he was talking about regarding the R4 spectrum was that the plants didn't seem to develop bleaching or burning at super high intensities. Not...

I guess more back to the initial question. How important are color temperatures of white diodes in relation and in combination with 660nm red diodes? So we've established that if we want to use less red diodes, then we must use more phosphorous infused white diodes, if we want to use more red...

I read a lot, and I don't keep a record of sources, but I found it. Here you go: https://www.cannabisbusinesstimes.com/article/growing-under-high-light-intensities-lighting-report/

Pretty much been saying this all along. R-W-FR ratios are much more important than the color temp of the white diodes. In fact you don't even want that much phosphor in your white diodes because it makes them both optically inefficient, as well as, thermally inefficient. Also, just read about a...

Definitely true. But you're still going to want to get a good uniform 1200ppfd over your canopy if you are using CO2.

Blue and Red are not only the most electrically efficient but also in terms of photosynthesis. If there are any two colors in the spectrum you would want to combine for growing it would be these two, in arguably different concentrations. I mean look at phillips-signify lights...they're pretty...

According to samsungs own testing, the regular 5000 evo is better than the mint in terms of flavinoid content.

Yes, and also flowering times reduced significantly over sativas. It's crazy to think about the amount of sun a sativa is exposed to in a lifecycle over a pakistani grown indica.

The high cri diodes provide higher levels of far red in the lower color temperature ranges. You can see that in Samsungs 90 cri diodes, so if nichia are 98Cri or whatever thats probably how they achieve those red levels. The question I'm stuck with is if this really translates to better growth...

Depends if you're gonna toke em or not :bigjoint:

I'd have to second that. The studies done by Nichia do show a difference in total weight and number of flowers, albeit I have not counted them.. but the competing flowers are defenitely more spaced out. It doesn't seem like the vibrance or quality of the flowers are any different in both...

That's interesting. They don't mention much about the conventional LED they are using. Lookis like a 5000k or 6500k as dude to lack of green. Added far red in the spectrum will improve growth, but you can get better concentrations in using DR and FR diodes.

It's not related to this thread.