New style Samsung LM561C Board

[legalcanada]

Oh! My mistake, I misread that. Well, I'm getting the 80CRI diodes from what the packaging says. I can live with that for $30 a board.

you get less lumens as CRI and spectrum increases. so 2700k 80CRI will have more lumens/watt than 2700k 90CRI, but i guess the quality of the light is better? so it's a trade off really.

 

[see4]

you get less lumens as CRI and spectrum increases. so 2700k 80CRI will have more lumens/watt than 2700k 90CRI, but i guess the quality of the light is better? so it's a trade off really.

agreed. and from my perspective, growing for personal use and pollen chucking, I suspect I will be happy with the 80cri 3000k-4000k mixed boards.

 

[legalcanada]

agreed. and from my perspective, growing for personal use and pollen chucking, I suspect I will be happy with the 80cri 3000k-4000k mixed boards.

yes i'm flowering under all 80CRI 4000k and am very happy with my results so far... big dense ass nugs and frosty too! had very little stretch during flip so that could be good or bad depending on preference i guess. maybe the results would be a little better with different diodes but i'm not complaining.

 

[chuckduck]

yes i'm flowering under all 80CRI 4000k and am very happy with my results so far... big dense ass nugs and frosty too! had very little stretch during flip so that could be good or bad depending on preference i guess. maybe the results would be a little better with different diodes but i'm not complaining.

Been emailing The Guy and, indeed, he said that he could do 90 CRI but it would have to be S3 bin.

 

[legalcanada]

A higher spectrum will give more lumens. 5000k will have a higher lumen per watt output than 3000k

you're right sorry i was mistaken, it looks like it goes up and peaks at either 4000k or 5000k then goes back down.

 

[legalcanada]

It does? It usually it keeps going up as spectrum goes up with other led. But of course more lumens doesn't necessarily mean more of what the plants can use, it usually means less when dealing with higher spectrums.

yes and it looks like different CRI doesn't change lumens per watt either as long as diodes are in same bin. i guess that's how they decide bins maybe?? but 90CRI is only up to S3, 80CRI has S6 and 70CRI has S7 for LM561C

I want to use LM302B diodes - much more powerful than LM561C - or also LM301A. or maybe some of their high power diodes instead of mid power. i guess it's all about cost and efficiency though. i don't understand the logistics of PCB circuit construction and stuff. on paper they look a lot more powerful though.

http://www.samsung.com/global/business/led/products/led-component/mid-power/

 

[Danielson999]

yes and it looks like different CRI doesn't change lumens per watt either as long as diodes are in same bin. i guess that's how they decide bins maybe?? but 90CRI is only up to S3, 80CRI has S6 and 70CRI has S7 for LM561C

I want to use LM302B diodes - much more powerful than LM561C - or also LM301A. or maybe some of their high power diodes instead of mid power. i guess it's all about cost and efficiency though. i don't understand the logistics of PCB circuit construction and stuff. on paper they look a lot more powerful though.

http://www.samsung.com/global/business/led/products/led-component/mid-power/

They're more powerful but they are much bigger. Kinda like comparing Vero 18 and Vero 29's for example. There is very little difference in terms of efficiency.

 

[nfhiggs]

They're more powerful but they are much bigger. Kinda like comparing Vero 18 and Vero 29's for example. There is very little difference in terms of efficiency.

Actually you lose a lot of efficiency moving up to the 302B. Their efficiency is ~140 L/W, while the 301B is ~220 L/W

 

[CobKits]

I think everyone should have one. one of the most useful tools a grower could have

seriously im not kidding. a lot of my "deficiencies" were too much flux for my setup (limited by other factors) but that is how i identified it

 

[legalcanada]

They're more powerful but they are much bigger. Kinda like comparing Vero 18 and Vero 29's for example. There is very little difference in terms of efficiency.

what do you mean bigger? they are 3mm X 3mm, smaller than lm561c (5.6mm x 3mm), and the high power diodes are 3.5mm x 3.5mm. i also don't really care about efficiency i just want most overall power. it's still more lumens total if a little less efficient. i want these lamps to last 2 years most because i'm sure i'll be upgrading after 2 years anyways with how fast LED tech is moving, then it'll become a veg light or something

@CobKits do you think a cheap lux meter, like the ones built in to samsung phones, is good enough to give an approximation when using white light LEDs? just until such time a PAR meter can be afforded...

 

[Prawn Connery]

Been emailing The Guy and, indeed, he said that he could do 90 CRI but it would have to be S3 bin.

What's the lead time on these boards? Does he have them in stock ready to go, or are they made on an order-by-order basis?

There was a girl who started another thread here talking about these, so I'm assuming common CRI/K boards are readily available while others are special order?

Is "The Guy" you're dealing with Jeff?

 

[ttystikk]

"Jeff" is the one that won't sell 288 or 304 boards due to NDA agreement with another customer but he does sell 336 peice boards for 35/ea. Build to order for most sellers on alibaba but it's only 3-7 days..

I'm interested in seeing how these work. Who will test them?

 

[legalcanada]

I'm interested in seeing how these work. Who will test them?

i will be doing a build early net year i think. someone in the thread also mentioned shipping a board to @CobKits to run some tests with but won't be for a little while

 

[Danielson999]

what do you mean bigger? they are 3mm X 3mm, smaller than lm561c (5.6mm x 3mm), and the high power diodes are 3.5mm x 3.5mm. i also don't really care about efficiency i just want most overall power. it's still more lumens total if a little less efficient. i want these lamps to last 2 years most because i'm sure i'll be upgrading after 2 years anyways with how fast LED tech is moving, then it'll become a veg light or something

@CobKits do you think a cheap lux meter, like the ones built in to samsung phones, is good enough to give an approximation when using white light LEDs? just until such time a PAR meter can be afforded...

You're right, I was high and looking at a completely different diode. At least the efficiency is very similar, not that it matters much to you or me.

 

[Randomblame]

what do you mean bigger? they are 3mm X 3mm, smaller than lm561c (5.6mm x 3mm), and the high power diodes are 3.5mm x 3.5mm. i also don't really care about efficiency i just want most overall power. it's still more lumens total if a little less efficient. i want these lamps to last 2 years most because i'm sure i'll be upgrading after 2 years anyways with how fast LED tech is moving, then it'll become a veg light or something

@CobKits do you think a cheap lux meter, like the ones built in to samsung phones, is good enough to give an approximation when using white light LEDs? just until such time a PAR meter can be afforded...

301A and 302B are 2years behind 301B and produce only 65% of the light. Do you really want to invest in old tech? Would you buy old CXA COB's when you can get CXB's? I think not!

Efficiency does not interest you, but better efficiency is what makes new LED's better. Would you rather get 14.000lm from 100w or rather 22.000lm from the same 100w? 200w of 301B(44.000lm) can do the same like 300w of 301A(42.000lm)!

And the old ones are probably not even cheaper as the newest! Do you still want to use old tech?

 

[legalcanada]

301A and 302B are 2years behind 301B and produce only 65% of the light. Do you really want to invest in old tech? Would you buy old CXA COB's when you can get CXB's? I think not!

Efficiency does not interest you, but better efficiency is what makes new LED's better. Would you rather get 14.000lm from 100w or rather 22.000lm from the same 100w? 200w of 301B(44.000lm) can do the same like 300w of 301A(42.000lm)!

And the old ones are probably not even cheaper as the newest! Do you still want to use old tech?

i'm not sure i just saw those 2 i mentioned are up to 1.5w and the 301B was only 0.3w so i was assuming with the same amount of diodes you would get 5x the wattage. even with efficiency difference i'm sure you're still getting more lumens. but of course more thorough research would be needed.

also the 302A is about the same efficiency. 130lm @ 150ma and 301B was only 60lm @ 65ma - so what do you mean? my logic says 5x the wattage for same diode size and same efficiency. compare to 561C @ only 38lm @ 65ma for same CRI/spectrum so it's already twice as efficient as that

i've already asked "The Guy" though and those diodes are not available in china - would need to purchase elsewhere and have them placed yourself or ship em to china and hope they don't swap em for something cheaper

 

[Randomblame]

A 301A comes at 350mA even to only 105-122lm/w, because that would be the upper limit.
Remember, the harder you drive LED's, the worse their efficiency will be.
If you rather want less but brighter diodes you need to use 1-5w diodes like XP-G3, Osram Oslon or Samsungs 5w diodes.

 

[Randomblame]

i'm not sure i just saw those 2 i mentioned are up to 1.5w and the 301B was only 0.3w so i was assuming with the same amount of diodes you would get 5x the wattage. even with efficiency difference i'm sure you're still getting more lumens. but of course more thorough research would be needed.

also the 302A is about the same efficiency. 130lm @ 150ma and 301B was only 60lm @ 65ma - so what do you mean? my logic says 5x the wattage for same diode size and same efficiency. compare to 561C @ only 38lm @ 65ma for same CRI/spectrum so it's already twice as efficient as that

i've already asked "The Guy" though and those diodes are not available in china - would need to purchase elsewhere and have them placed yourself or ship em to china and hope they don't swap em for something cheaper

The advantage of mid-power diodes is that they are small and generate only 0.2w heat maximum. This makes their thermal management so easy and is the reason why they are so good.

 

[ttystikk]

The advantage of mid-power diodes is that they are small and generate only 0.2w heat maximum. This makes their thermal management so easy and is the reason why they are so good.

Hence my curiosity about those big 336 diode boards. If they're legit they look like something I'd be interested in.

 

[Randomblame]

i'm not sure i just saw those 2 i mentioned are up to 1.5w and the 301B was only 0.3w so i was assuming with the same amount of diodes you would get 5x the wattage. even with efficiency difference i'm sure you're still getting more lumens. but of course more thorough research would be needed.

also the 302A is about the same efficiency. 130lm @ 150ma and 301B was only 60lm @ 65ma - so what do you mean? my logic says 5x the wattage for same diode size and same efficiency. compare to 561C @ only 38lm @ 65ma for same CRI/spectrum so it's already twice as efficient as that

i've already asked "The Guy" though and those diodes are not available in china - would need to purchase elsewhere and have them placed yourself or ship em to china and hope they don't swap em for something cheaper

You need to calculate their lm/w performance correctly. I highly recommend to try Samsung LED calculator for comparisions. No need to calculate anything, simply choose an LED from the list, choose spectrum, CRI, flux and voltage bins...

http://www.samsung.com/global/business/led/support/tools/calculator-pkg