COB efficiency Spreadsheets

AquariusPanta said:

Lol, what's your point? Look at the question I was answering? Someone asked about what forward voltage was like for the Cree CXB3590 at currents between 250~500mA and the Cree CXB3590 datasheet doesn't provide anything lower than 1400mA for 36V version, as your photo reinforces, while Bridgelux Vero DOES in fact offer a complete graph, starting from 0mA.

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You and your gang here at RIU are so amusing at times. If only you tried as hard at making me look bad as you did in your product development...

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hahahahahahahahahahahahahaha...my product development. I think I just pissed myself. You're a joke. We can take this to your thread or mine if you want to start digging at me and my business.

Any grows going for you, or your "PLC fucked a JGL" lights...? Or even the death shocker models?
None around here...or IC...or the farmer...or insta...or any decent forum... or even the real world??

Pick the thread...I'll be there.

AquariusPanta said:

You and your gang here at RIU are so amusing at times. If only you tried as hard at making me look bad as you did in your product development...

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You don't need anyone else to help you look bad .. you've brought it upon yourself on your own imo.

... pushing your overpriced crap ... trying to discredit those who have way more understanding than you do ...

Seriously, what did you expect ? (rhetoric question, don't bother answering)

It's all about 3590's just face it guys Veros or 3070s don't compare in my book. Now lets get back to the topic. We need to stop fighting it's getting us no where. You guys are lucky I didn't start a light company because I'd destroy you guys with marketing which none of you really have because if you guys really did you wouldn't be arguing on this thread or even arguing at all.

AquariusPanta said:

Someone asked about what forward voltage was like for the Cree CXB3590 at currents between 250~500mA and the Cree CXB3590 datasheet doesn't provide anything lower than 1400mA for 36V version

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Don't you think the Vf would curve downwards more with lower currents? Just like in the Bridgelux graph (which has current and Vf swapped).

just waiting for jerry form kb give me numbers on (12) cxb 3590 cd 3500k .(3)hlg185h1400c. putting them on (3) 38'' 5.886 heatsink .putting 4 cobs on each with 9 inch spread. gonna use the ideal connectors with glass lens at 80 degrees ..and I'm gonna run it in a 5x5 tent for flower ..very excited to do my first diy led ...and use the clw ss880 for veg for now

john0000 said:

just waiting for jerry form kb give me numbers on (12) cxb 3590 cd 3500k .(3)hlg185h1400c. putting them on (3) 38'' 5.886 heatsink .putting 4 cobs on each with 9 inch spread. gonna use the ideal connectors with glass lens at 80 degrees ..and I'm gonna run it in a 5x5 tent for flower ..very excited to do my first diy led ...and use the clw ss880 for veg for now

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330 par watts and 27.5 par watt ft^2 if my math is right

bassman999 said:

330 par watts and 27.5 par watt ft^2 if my math is right

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that is good right?? lol

john0000 said:

just waiting for jerry form kb give me numbers on (12) cxb 3590 cd 3500k .(3)hlg185h1400c. putting them on (3) 38'' 5.886 heatsink .putting 4 cobs on each with 9 inch spread. gonna use the ideal connectors with glass lens at 80 degrees ..and I'm gonna run it in a 5x5 tent for flower ..very excited to do my first diy led ...and use the clw ss880 for veg for now

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Good to hear but 4 CXB will crush the CLW for veg and at least you didn't smash it like I did a Mars II 900w lol

REALSTYLES said:

Good to hear but 4 CXB will crush the CLW for veg and at least you didn't smash it like I did a Mars II 900w lol[

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REALSTYLES said:

Good to hear but 4 CXB will crush the CLW for veg and at least you didn't smash it like I did a Mars II 900w lol

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im gonna put all then cxb in a 5x5 ft tent for flower and use clw for another tent for veg...do you think that spread i said for the 5x5 with the 12 cxb's is good..also was wandering 330 par watts and 27.5 par watt ft^2 is good??

john0000 said:

im gonna put all then cxb in a 5x5 ft tent for flower and use clw for another tent for veg...do you think that spread i said for the 5x5 with the 12 cxb's is good..also was wandering 330 par watts and 27.5 par watt ft^2 is good??

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I'm running 12@50w in a 5x5 right now. Looking pretty awesome so far. My heatsinks are 36" long. If I were to do it again with a 5x5 space In mind I would probably make them 48" long to spread them out a little more. But also I am using lenses which is cutting off the light at 90 degrees instead of 115 or whatever it is. Might try the next run without lenses and see how well it works.

Getgrowingson said:

I'm running 12@50w in a 5x5 right now. Looking pretty awesome so far. My heatsinks are 36" long. If I were to do it again with a 5x5 space In mind I would probably make them 48" long to spread them out a little more. But also I am using lenses which is cutting off the light at 90 degrees instead of 115 or whatever it is. Might try the next run without lenses and see how well it works.

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nice good luck with the grow ..like to see the end results and some pics..

john0000 said:

that is good right?? lol

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That is a question better answered by someone who is more knowledgeable in this area than I.

There are some who have good results with less, and others who use more.
I think littlejacob uses 18-19 par w ft^2

bassman999 said:

That is a question better answered by someone who is more knowledgeable in this area than I.

There are some who have good results with less, and others who use more.
I think littlejacob uses 18-19 par w ft^2

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ok cool so if mine is about 50 percent more par if calculations is right ..then should be good ..how long does it usually take for kingbrite to get back to you and fulfill your order ..im in the north east usa

when people refer to gpw do they go off the the watts from wall or the par watts

john0000 said:

ok cool so if mine is about 50 percent more par if calculations is right ..then should be good ..how long does it usually take for kingbrite to get back to you and fulfill your order ..im in the north east usa

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He replies within a day weekends might prolong that, and DHL is 2 days to me in Cali

john0000 said:

when people refer to gpw do they go off the the watts from wall or the par watts

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Watts from the wall

bassman999 said:

Watts from the wall

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thanks for the help and explaining things your very helpful

Hi Alesh,

I was wondering, now that @Greengenes707 and Cutter have provided (some kind of) spd data for CX 3500K, did you by anychance work out a value for it ?

Do you have a number for 450nm blue led too ? (any brand ..)

Thanks for this enlightening data

alesh said:

This is what happens if we strip anything outside of the 400-700nm range.
View attachment 3405137

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REALSTYLES said:

It's all about 3590's just face it guys Veros or 3070s don't compare in my book. Now lets get back to the topic. We need to stop fighting it's getting us no where. You guys are lucky I didn't start a light company because I'd destroy you guys with marketing which none of you really have because if you guys really did you wouldn't be arguing on this thread or even arguing at all.

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actually.... start a light company dude

please

Firstly, thanks for to all concerned in the gathering and making available to RIU this invaluable information. This spreadsheet is the final piece in the puzzle I needed in order to help me understand the ins & outs of LED lighting.

However, I think a found a mistake in the spreadsheet. Maybe not a big deal for folks who know far more than me, but I'm a noob at LEDs and I'm not sure if what I am reading is correct or not.

I am in the process of comparing a few LED COBS against each other, and one of the COBs I'm interested in evaluating is the CXB2530-0000-000N0UT230H. So I had a look at the data in the CREE_TYP worksheet and found nothing for CXB2530 COBs, but there was data available for CXB2350 as well as CXA2530. Doing a Google search on both of these COBs I was able to find a datasheet for the CXA2530, but when I searched for CXB2350 I found nothing. So I'm wondering if the labels in the CREE_TYP worksheet are correct or not, as I suspect the CXB2350 should actually be CXB2530.



Could someone please clarify whether the labels are correct or not, and if not, then what they should be.

Thanks.