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Dude, there are several diodes which are out on the left board. As Rocketsoul says, just cut it in half an discard the faulty side. Then run the positive and negative to the positive and negative on the driver an run half the power. You could probably use a wattmeter to know what wattage you're...

How come you're not a fan of Sosen?

If they are running these boards at 314W DC/55v/5.6A for the HLG 350... that means you could get more out of 1 x QB648 by using a 200W driver. Yeah its not going to be as electrically efficient at lower wattages, but you're getting a lot more light by squeezing the white diodes from 77.77mA to...

I've decided though... I wouldn't add anything other than far red to the circuitry, unless there's a good argument that the 405 lifespan us the same, which ut seems there may be some doubt.

Well the Nichia 405's are like 4V+... Not really an issue adding 2V, but wouldn't you have to do it to every circuit? and there are 6. But overall 660nm would take a hit?

Which 400nm diode?`And that would probably fuk up the circuit, no? I'd be more tempted to add FR. I think voltage wise the Osram Square Reds are quite compatible, but their royal blue is 25% higer voltage.

Well according to HLG reds's are 6x the current of whites. So St test-current on whites of 65mA reds will be 390mA. So at test current of white total system would be 2.73A @ 56V (actually probably lower with low voltage bins) that's 152.88W. Thats running at half the test current for red. If we...

So constant voltage at 2.2A?

I don't quite understand this chart... could you explain why voltage are increased by almost 9V at 2200mA to go from 112.2w to 129.4W? How does current stay at 2.2A?

Hey bud, how u like them? Comparable to other lights u tried?

My bad, apparently the Diablo X is 5280K. Which means they would probably be using 5700K and 4000K to achieve this CCT. Now if you are going for a versatile light which will be good for VEG and Flower, then this makes good sense, considering the amount of red photons 660nm available. Apparently...

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...