Most Efficient LED Light

Stephenj37826 said:
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For those looking for that magic 2.8+ number @ system level
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@churchhaze is it april 1st?..............................lol...........................you probably don't want me to quote you on this down the road.

maybe I stepped out of a time machine, POSSIBLE..........not hitting that system efficiency with white phosphor in 2016

I'm a pessimist, so prove me wrong...I like the taste of crow:)
 
Rahz said:
I'll take a look at your math if you like but it depends on the drive current.

At 2.1 amps each, 493x CXB3590 = 36975 watts x 2.3umol/j = 85,425 PPF
50x 1000w DE = 50,000 watts x 1.7umol/j = 85,000 PPF
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@Rahz, where did you get the 2.3umol/j figure for this calculation? I've been playing around with the DIYCOBLED Calculator and I can't seem to get the numbers to match yours.
 
Chunky Stool said:
So it's a 400W equivalent instead of a unit that draws 400 watts?
Makes sense I guess.
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I can't see where he said that... You'd need an ~85% efficient lamp at 400W to beat a 1000W lamp at 34% efficient and a ~90% efficient 400W lamp to beat a 36% efficient 1000W lamp.

(1000W*0.36)/400W = 90%

You won't find an LED setup that's 85-90% efficient. It has nothing to do with "equivalent" watts. If you see someone listing equivalent watts, don't even consider the product as a viable grow lamp.
 
Ben-Ben said:
hey guys

wanted to know what everyone's thoughts are right now on the most Efficient LED available today.

I want to replace several Gavita DE 1000W in our rooms we have 6 per room, we would like to replace and can't seem to decide what is a Suitable alternative.

any suggestions or input would be greatly appreciated.
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From reading a few pages of this thread, it seems to me like your best option for now is to stay with DE thousies for now. I'd personally experiment with small (4x4) grows and COB builds, but economically, you're probably better off scaling with gavitas and coming back to the cobs in a year or 2.
 
churchhaze said:
From reading a few pages of this thread, it seems to me like your best option for now is to stay with DE thousies for now. I'd personally experiment with small (4x4) grows and COB builds, but economically, you're probably better off scaling with gavitas and coming back to the cobs in a year or 2.
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I'm curious as to how you would come to that conclusion.
Based on what I've seen on this thread, the economic side of the picture looks very attractive at a large scale.
My concern would be efficacy at scale. With smaller rooms and fewer plants, canopy management is less of an issue, ie scrogs and such.
With larger rooms and many plants, training doesn't scale well.
To growers that like to work with large plants and have tried COBs, how does a COB setup compare to pushing light further down on plants with tall colas?
Assuming of course that you're pushing enough power, say using the example setup that @Rahz quoted earlier:

At 2.1 amps each, 493x CXB3590 = 36975 watts x 2.3umol/j = 85,425 PPF
50x 1000w DE = 50,000 watts x 1.7umol/j = 85,000 PPF
 
MildGro said:
I'm curious as to how you would come to that conclusion.
Based on what I've seen on this thread, the economic side of the picture looks very attractive at a large scale.
My concern would be efficacy at scale. With smaller rooms and fewer plants, canopy management is less of an issue, ie scrogs and such.
With larger rooms and many plants, training doesn't scale well.
To growers that like to work with large plants and have tried COBs, how does a COB setup compare to pushing light further down on plants with tall colas?
Assuming of course that you're pushing enough power, say using the example setup that @Rahz quoted earlier:

At 2.1 amps each, 493x CXB3590 = 36975 watts x 2.3umol/j = 85,425 PPF
50x 1000w DE = 50,000 watts x 1.7umol/j = 85,000 PPF
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I think the cob lighting scales up fine for larger plants.im in the process of changing over most of my 11kw flower room to cobs a few bars at a time.i like what i have seen and smoked so far :)
20160906_192028cob mk.jpg 20160906_192107cob mk.jpg

And i will add these are cree cxb 3590 run @ 1050 ma.im sure you can grow monsters under the same chip @ 1400ma or even 1750ma.
 
sixstring2112 said:
I think the cob lighting scales up fine for larger plants.im in the process of changing over most of my 11kw flower room to cobs a few bars at a time.i like what i have seen and smoked so far :)
And i will add these are cree cxb 3590 run @ 1050 ma.im sure you can grow monsters under the same chip @ 1400ma or even 1750ma.
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@sixstring2112 Them be some fine looking ladies bro. I've followed alot of your posts, learned and laughed alot haha.

I'm working on a similar room as you by the looks of it. I was thinking of 2 bars of 6 pushing them a bit harder for every swap, say around 2000ma. That would still give around 50% efficiency and save enough power.

Was debating going with or without the reflectors though. You finding they help push the light further down into the tall girls?
 
BM9AGS said:
So when can I get a rough one. Don't need certain cents or pretty colors.
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Still doing some testing on those boards. Working on heatsink designs. Sphere test end of this month.
@Stephenj37826 came up with this idea and I helped him design/test. He would know more about release date. I think first week of Nov.
No colors for now. All white didoes.

Also in development. 4ft long bar. Razor 250. Not as efficient as the DIY Quantum Boards but great price. Shipped for sphere testing this week. This one will use Lumileds or Nichia 3030 package. Trying to increase the efficiency as best as possible within the budget.
upload_2016-10-9_13-29-2.png
 
MildGro said:
@sixstring2112 Them be some fine looking ladies bro. I've followed alot of your posts, learned and laughed alot haha.

I'm working on a similar room as you by the looks of it. I was thinking of 2 bars of 6 pushing them a bit harder for every swap, say around 2000ma. That would still give around 50% efficiency and save enough power.

Was debating going with or without the reflectors though. You finding they help push the light further down into the tall girls?
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well i personally think anything over 50% is awesome compared to what we been using for years right lol.as for the reflectors,im not totally sure yet but i just think for taller plants you want the light going down not sideways.i have another 540w setup right next to this one with no reflectors so in about 7 weeks i will know more on this.but the par readings im getting are the same at 18 inches,the bare cobs win at 12 inches and the reflectors win at 24 inches.but at 12 inches there are alot of dead spots between the reflectors where par is only hitting about 300 and the bare cobs hit about 850 in those same areas between cobs.i run my lights up around 18 inches so im good i think.you run 2000ma and bare cobs i bet the par numbers are fuckin awesome at 18inches and 24 inches.
 
sixstring2112 said:
well i personally think anything over 50% is awesome compared to what we been using for years right lol.as for the reflectors,im not totally sure yet but i just think for taller plants you want the light going down not sideways.i have another 540w setup right next to this one with no reflectors so in about 7 weeks i will know more on this.but the par readings im getting are the same at 18 inches,the bare cobs win at 12 inches and the reflectors win at 24 inches.but at 12 inches there are alot of dead spots between the reflectors where par is only hitting about 300 and the bare cobs hit about 850 in those same areas between cobs.i run my lights up around 18 inches so im good i think.you run 2000ma and bare cobs i bet the par numbers are fuckin awesome at 18inches and 24 inches.
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Yeah, I still have some doubters in my camp even though I've demonstrated results on a smaller scale. That's why I want to crush the DEs by pushing a higher current, then perhaps scale back by dimming a bit once I've proven my point. Or not, and just crank it up even more, which just might happen when we see the scales.

All that great math on here certainly helps, but nothing helps as much as getting a real reading.

Also thanks for the tip on the reflectors. I'll probably go without since I can always add later. Also going to have some spread from adjacent bars so I think the penetration should be awesome.

That's what she said!
 
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robincnn said:
Still doing some testing on those boards. Working on heatsink designs. Sphere test end of this month.
@Stephenj37826 came up with this idea and I helped him design/test. He would know more about release date. I think first week of Nov.
No colors for now. All white didoes.

Also in development. 4ft long bar. Razor 250. Not as efficient as the DIY Quantum Boards but great price. Shipped for sphere testing this week. This one will use Lumileds or Nichia 3030 package. Trying to increase the efficiency as best as possible within the budget.
View attachment 3800603
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Well congrats you two for doing great things for the community I'm impressed thelumileds and Nichols are performing that well. Where will be in just 2more years!!!

Please Let me pre order some.
 
So I'm planning my build as we speak.

8x Citizen 1212's @ 700ma
8x Pin Fin Heatsinks. What size should I go for passive solution? I'll have a box fan or something for airflow. Would be nice if they could handle COBs being run at 1400ma too.
8x Holders. What are the cheapest holders for these bad boys that won't require soldering? I can solder, but I just prefer a more modular approach and less time consuming.
8x Reflectors. These worth getting?
1x Driver. What meanwhile driver should I get? Would like a dimmable one.

Also, what's a good source for wiring? Not sure if I should get anything fancy.

This sound reasonable for a 2'x4' grow space for a single plant? How will light penetration be? Soil if that matters.
 
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BM9AGS said:
So when can I get a rough one. Don't need certain cents or pretty colors.
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Ok! I give in. I'll tell you the secret behind Amare & why it (edit) it's so great! .
image.jpg It's magic!!! lol!
Chill out. Just be happy there's more n more quality LEDs being developed for growing. You very easily could've gotten into led a few yrs ago & had very minimal options & lost allot in yields.
 
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MildGro said:
@Rahz, where did you get the 2.3umol/j figure for this calculation? I've been playing around with the DIYCOBLED Calculator and I can't seem to get the numbers to match yours.
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It's based on stats pulled from the datasheet, but really and especially with a build that big Citizen and Bridgelux both have better products you can DIY with now. Have a look at the Vero29C at 1.05 amps. Same output as the 3590 for $10 less and uses 5 watts less.
 
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