New style Samsung LM561C Board

[Serva]

My premise is that combining 3000k and 4000k diodes on a single board, I will get the benefit of both spectrums, 3000k emits wavelengths not emitted from 4000k and 3500k diodes. The argument is that mixing 3000k and 4000k diodes will produce 3500k spectrum. Which is true in that your eye and my eye see a blended spectrum, but the 3000k diodes still emit the wavelengths not seen in 3500k and 4000k diodes... wavelengths that are beneficial to the plant. The plant doesn't care about spectrum as described in Kelvin, it cares about the wavelengths/photons that it gets bombarded with, "visual" or not.

The graph you are showing us, doesn‘t support your opinion! The only fact the graph is showing is, that we have a value of 0.2 (5000K) for 700nm and 0.4 (3000K) not that 5000K isn‘t producing 700nm...

 

[Serva]

True, but plants will adjust to what you give them by changing their colour a bit.

yeah sure, nature is great at adopting. But the optimum is like a bell curve. It will be best when it‘s in the middle.

But you can teach a plant, to adapt to different circumstances. For example: I live in the mountains, and have cold weather. I take seeds from my vegetables year and year again, and I can see them getting adapted to the weather here!

But this won‘t happen in one season, or one growing circle. Evolution needs time!

A landrace from africa will need time to adapt to indoor growing conditions, because they are so different, that‘s the work of breeding...

 

[see4]

Huhh?! You never pointed out this fact! You want MIX it, not adapting like nfhiggs pointed out

nfhiggs' observation is moot to my premise.

i could have bought 6 boards of 3000k and 6 boards of 4000k, and then I could have run the 4000k boards during veg, and moved to 3000k boards for flower. then i saw that The Dawg grew beautiful nugs using 4000k, so I decided to buy 12 mix diode boards to experiment with the outcome.

The graph you are showing us, doesn‘t support your opinion! The only fact the graph is showing is, that we have a value of 0.2 (5000K) for 700nm and 0.4 (3000K) not that 5000K isn‘t producing 700nm...

I agree, a 3000k diode and a 3500k diode both emit wavelengths in the same nanometer. Would you agree that the 3000k diode emits more (far reds) than the 3500k diodes do? Remember, the graph shows distributed normalization.

 

[ANC]

Agreed, but yeah, we are not able to perfectly imitate the sun at an acceptable cost factor yet.

I breed fish. They like all kinds of different pH and temps. Rather than trying to artificially control this you work with the water you have and let the fish adapt.
Although this does not give them all ideal conditions, it provides consistency.

Growmaus tested some 3k5s, said the spectrum was closer to 3200 in tests.

 

[Serva]

nfhiggs' observation is moot to my premise.

i could have bought 6 boards of 3000k and 6 boards of 4000k, and then I could have run the 4000k boards during veg, and moved to 3000k boards for flower. then i saw that The Dawg grew beautiful nugs using 4000k, so I decided to buy 12 mix diode boards to experiment with the outcome.



I agree, a 3000k diode and a 3500k diode both emit wavelengths in the same nanometer. Would you agree that the 3000k diode emits more (far reds) than the 3500k diodes do? Remember, the graph shows distributed normalization.

For sure, also nfhiggs would support this! But you told us, that a 5000K isn‘t producing any 700nm light. And that‘s not correct.

In fact there are different LEDs that producing far red / infrared, which the normal 80CRI LED isn‘t. But you didn‘t showed us these specs

Edit: and you also didn‘t choosed these kind of LEDs. You just tooked the „normal“ CRI80 strips...

 

[Serva]

Personally I am mixing my specs because of 2 reasons:
1) I think it‘s more efficient, that a mixed spectrum
2) I get the specs I want (for me 4250 and 4800, yes for flowering...)

 

[Serva]

Agreed, but yeah, we are not able to perfectly imitate the sun at an acceptable cost factor yet.

I breed fish. They like all kinds of different pH and temps. Rather than trying to artificially control this you work with the water you have and let the fish adapt.
Although this does not give them all ideal conditions, it provides consistency.

Growmaus tested some 3k5s, said the spectrum was closer to 3200 in tests.

But the fish babys will have adapted better than the parental generation, no?

For sure I wouldn‘t put a heating mat around my plants. But I have a greenhouse for the plants I couldn‘t grow otherwise, because they could never adapt to the conditions here in the mountains, like 50F in september. I nedd to give them a enviroment, which they can adapt and not die

Like you won‘t put a fish used to salt water in a pond of fresh water?!

 

[see4]

For sure, also nfhiggs would support this! But you told us, that a 5000K isn‘t producing any 700nm light. And that‘s not correct.

I never made that claim at all. If you interpreted that, I may have not been clear. I have never thought that. I was merely assuming that we know that 3000k emits 'more' far red than 5000k at normalized intensities.

In fact there are different LEDs that producing far red / infrared, which the normal 80CRI LED isn‘t. But you didn‘t showed us these specs

Moot point.

Edit: and you also didn‘t choosed these kind of LEDs. You just tooked the „normal“ CRI80 strips...

No. I had the manufacturer make a board with a mix of diodes, I didn't take any strips.

Personally I am mixing my specs because of 2 reasons:
1) I think it‘s more efficient, that a mixed spectrum
2) I get the specs I want (for me 4250 and 4800, yes for flowering...)

And that probably produces what you want. I prefer slightly different controls. To each their own.

 

[Serva]

So to come back to the point here, a 5000K light will produce the same light quality as a 3000K one. Just that the value of each nm section will be different. If you want to add something, that you have to look into UV, FR, and IR, and not different specs (even the 3000K is low in FR, and has no IR)

 

[Serva]

. A 3000k spectrum diode produces wavelengths beneficial to plants not found in 4000k and 3500k spectrums.

Ok, I assumed you mean FR.

But than, please tell me, which wavelengths isn‘t produced by the 3000K not found at all in 3500K, or 4000K???

Like I tell you all the time now, the graph doesn‘t support this opinion! Find another graph you can point to...

EVERY wavelength is found in EVERY spectrum, just the value is different...

 

[Theirongrow]

Some one ordered stuff at this company shenzhen R2T electronic limited

Tomorrow ill post a link.

Tomorrow?? today why not? Was the link lost or does it still not exist?
Another one? now it does not smell bad, it smells to dead......., in the end we have all alibaba scamers selling boards in the forum,
@Stephenj37826 @CobKits @robincnn and many others paying the advertising in the forum and these scamers open a user in the forum to scam people, and free?
I think @rollitup should take action against this thread as they detect several fraudsters Chinese trying to cheat forum users.
I have detected more than one scamer in the thread. Someone is going to take a pleasant surprise, Lol.

 

[see4]

So to come back to the point here, a 5000K light will produce the same light quality as a 3000K one. Just that the value of each nm section will be different. If you want to add something, that you have to look into UV and IR, and not different specs

I agree. 3000k will have 'more' far reds than 5000k, but they both produce them nonetheless.

Once I've done a grow or two with these boards, I'll likely add some uv to the mix. As I understand it, that is good for terpines and sugars, right?

Ok, I assumed you mean FR.

But than, please tell me, which wavelengths isn‘t produced by the 3000K not found at all in 3500K, or 4000K???

I suppose that depends on the intensity of the wavelength emitted. If the normalized distribution intensity is 0.8, 3000k is producing far more 660nm photons than 3500k.

 

[Serva]

Here is a spec of an 10000K t5 tube. And you can see, that this light will add wavelengths, you don‘t achieve with LEDs!

 

[see4]

Here is a spec of an 10000K t5 tube. And you can see, that this light will add specs, you don‘t achieve with LEDs!

Nice light! Wish it didn't have all that green though.

 

[Serva]

I agree. 3000k will have 'more' far reds than 5000k, but they both produce them nonetheless.

Once I've done a grow or two with these boards, I'll likely add some uv to the mix. As I understand it, that is good for terpines and sugars, right?


I suppose that depends on the intensity of the wavelength emitted. If the normalized distribution intensity is 0.8, 3000k is producing far more 660nm photons than 3500k.

Yeah, but mixing 3000 + 4000 will let you get the same amount of far red, like a 3500 is putting out. That‘s the result of the spectrometer analysis of robin!

 

[Serva]

Nice light! Wish it didn't have all that green though.

Green and yellow is also important! It will penetrate deeper, so informations in the plant can be transported a different way. Nature is perfect! And sunlight has a lot of green and yellow, which the plants use

 

[see4]

Yeah, but mixing 3000 + 4000 will let you can the same amount of far res, like a 3500 is putting out. That‘s what the result is of the spectrometer analysis of robin!

I hear ya. And I'm sure robin's work is legit information. But I want to know for myself.

Green and yellow is also important! It will penetrate deeper, so informations in the plant can be transported a different way. Nature is perfect! And sunlight has a lot of green and yellow, which the plants use

Green plants reflect green light, that's why we see it as green. Afaik, green plants have little use for green light.

 

[Prawn Connery]

My premise is that combining 3000k and 4000k diodes on a single board, I will get the benefit of both spectrums, 3000k emits wavelengths not emitted from 4000k and 3500k diodes. The argument is that mixing 3000k and 4000k diodes will produce 3500k spectrum. Which is true in that your eye and my eye see a blended spectrum, but the 3000k diodes still emit the wavelengths not seen in 3500k and 4000k diodes... wavelengths that are beneficial to the plant. The plant doesn't care about spectrum as described in Kelvin, it cares about the wavelengths/photons that it gets bombarded with, "visual" or not.

Can I ask a simple question? What wavelengths do Samsung LM561C 3000K 80 CRI diodes emit that 3500K and 4000K don't emit?

I do understand what you are saying - that Kelvin CCT is based on average visible wavelengths that may peak and trough at different points. Comparing SPD graphs for fluorescent, HPS and LEDs - all rated at 3000K - shows they are not all equal in terms of wavelength distribution.

However, I'm looking at the Samsung LM561C datasheets and they all emit the same wavelengths at different ratios, as they are all based on the same light source with different phosphor coatings.

By mixing 3000K and 4000K you might find a slightly different ratio of wavelengths for the same output as a single 3500K source, but at face value there does not appear to be that much - if any - difference.

 

[Prawn Connery]

Green plants reflect green light, that's why we see it as green. Afaik, green plants have little use for green light.

That's very much incorrect.

 

[Prawn Connery]

But than, please tell me, which wavelengths isn‘t produced by the 3000K not found at all in 3500K, or 4000K???

Like I tell you all the time now, the graph doesn‘t support this opinion! Find another graph you can point to...

EVERY wavelength is found in EVERY spectrum, just the value is different...

Beat me to it!