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I don't want to get to specific, but any accurate data in the development of a plant in relation to spectrum is extreemely valuable.

I'm working on some AI stuff right now which pretty much answers your question.

that's new to me... which formulas we talking about?

Thanks for providing that. What happens to lettuce is still an indicator of what can happen in cannabis, or any other plant for that matter :)

This is the spectrum using 3000k B/H and 5000K EVO. I am not sure that would classify as being too blue? You want a nice blue spike.

Yes, his colleague used laser diodes for the testing as laser diodes have a very narrow spectrum. I think luminus' diodes have a 5nm variance so its hard to pinpoint exact data without laser diodes... which btw have not been developed yet. I think, however, that far red in terms of application...

I would argue that the overall plant health would be better also.

Yes, white in combination with red will always be favorable no matter what ct. Intensity is a more interesting subject, efficiency aside. You could reach the same system color temperature using straight 5000K whites and compensate with red, and be considerably more efficient and increase intensity.

also, if the point is to mimic HID lighting with LED, then just buy HID... it's cheaper. The whole idea with using LED is you can customize spectrum based on wavelengths of light and increase the efficiency per watt.

yeah but what kind of blue diode is the question here... a 435nm one or a 450nm one? There are many good arguments for using green light, and personally I'm more in favor of green light... the green light is what makes it white to our eye. I don't think using 2700k diodes is going to be better...

If there is, I'm sure it's proprietary for the time being.

cant find it right now, but the testing is done by samsung themselves. And I'm also pretty sure that research points to the fact that plants do not really care that much about color temperature, as long as you have the correct wavelengths within the PE spectrum.

Ha! Your kidney is? How much?

Well, first the EVO diode is more efficient. It also brings benefits in terms of higher flavinols compared to the 310b/h. Also, I think some of the independent UV and near UV research done here alludes to the fact that a 437nm pump vs. a 450nm pump is going to get you higher cannabinoids. In...

No I'm saying that I suspected that HLG tried to claim the LM301H EVO as their own diode, but ended up with what they have in their Tomahawk instead.

Not talking about the H, I'm talking about the H-EVO.

If you see the blue spike for the diablo I could be wrong but the change from 5mm heatsink to 2.4mm or whatever is indicative that they are using the latest generation samsung diodes which have a different casing material. That would be true for H and H EVO. They have also switched to Osram...

exactly, they're saying they use the lm301H EVO diodes aka 437nm pump... but probably in combination with lm301h diodes at 450nm... pluss 33% extra red.

Uhm, I'd be hard pressed if they weren't using 4000K lm301H or LM301B EVO diodes, and 4000K EVO diodes. You would see a clear difference between a mint white and a 4000K diode, and for sure a mint white diode and a 3500K diodes. My guess is a 450nm diode and a 437nm diode around 4000k. The reds...

I remember getting some insanely good weed from malaysia when I lived in singapore as a teenager. I've never gotten close to anything that even remotely resembles it. It was damn near psychadelic. I guess it's like most stuff that gets produced on scale, it becomes bland and stripped of its...