• Here is a link to the full explanation: https://rollitup.org/t/welcome-back-did-you-try-turning-it-off-and-on-again.1104810/

COB help, first build

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Tanner Brundy

New Member
hey fellas and felladies. iv recently started looking into doing a diy cob led with the citizen clu058 1825 @ 1400ma and was curious when selecting temperatures. iv always been under the impression that 2700k is a good color spectrum for flowering. does the citizen clu058 1825 80cri in 2700k ran at 1400ma fall under the 570nm? and seem to be a decent spectrum? because its base efficiency is 2250ma divided by 1400ma im driving at, multiplied by 100 giving me 62% efficiency i think it does but im also VERY new at thisclu058-1825-80cri-spectrum.jpg
 
NanoGadget

NanoGadget

Well-Known Member
I would maybe have a moderator move this post to the LED section of the indoor forum. You'll have a lot better luck there.
 
coreywebster

coreywebster

Well-Known Member
Tanner Brundy said:
hey fellas and felladies. iv recently started looking into doing a diy cob led with the citizen clu058 1825 @ 1400ma and was curious when selecting temperatures. iv always been under the impression that 2700k is a good color spectrum for flowering. does the citizen clu058 1825 80cri in 2700k ran at 1400ma fall under the 570nm? and seem to be a decent spectrum? because its base efficiency is 2250ma divided by 1400ma im driving at, multiplied by 100 giving me 62% efficiency i think it does but im also VERY new at thisView attachment 4067239
Click to expand...
I'm not sure what you mean by fall under the 570nm?
I run those same cobs but in 90cri @3500k and they are great.

I believe though ( from the cob calculator) the efficiency of 80cri @ 2700k is more around 48%.

Is it a good spectrum, yeah, although less common than 3000k or 3500k, you have to remember these K values we used to use were based on cfl or hps mh lighting, these white lights provide a really good mix. The closer we can get to the McCree curve the better.

 
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cosmonautking

Active Member
im under the impression that drving at different loads changes the effeciency of the chip. and according to the calculator, driving a 2700k color chip at 1400ma will run at what you say is 48% efficiency so if you follow the red line on the chart to 48% over the 2700k selection it falls on both 540nm and 650nm
 
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cosmonautking

Active Member
thank you very much for the suggestion and it has been moved. if a moderator could remove this post i would greatly appreciate it.
 
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