CXB3590 1500W

[littlejacob]

Bonjour
You said you want 6 cxb3590 @1050mA for 60% efficiency...an hlg-240-1050b will be fine for this......
CU

 

[bggrass]

the equations i extrapolated from this graph and Supras charts for a 3590 3500k CD bin are:

W = Dissipation wattage
I = current
E= efficiency

W=1.2425 * I^2 + 34.214 * I - 1.6752
E=0.8948 * I^2 - 13.203 * I + 73.234

which gives

I W E
0.1 1.758625 71.92265
0.15 3.484856 71.27368
0.2 5.2173 70.62919
0.25 6.955956 69.98918
0.3 8.700825 69.35363
0.35 10.45191 68.72256
0.4 12.2092 68.09597
0.45 13.97271 67.47385
0.5 15.74243 66.8562
0.55 17.51836 66.24303
0.6 19.3005 65.63433
0.65 21.08886 65.0301
0.7 22.88343 64.43035
0.75 24.68421 63.83508
0.8 26.4912 63.24427
0.85 28.30441 62.65794
0.9 30.12383 62.07609
0.95 31.94946 61.49871
1 33.7813 60.9258
1.05 35.61936 60.35737
1.1 37.46363 59.79341
1.15 39.31411 59.23392
1.2 41.1708 58.67891
1.25 43.03371 58.12838
1.3 44.90283 57.58231
1.35 46.77816 57.04072
1.4 48.6597 56.50361
1.45 50.54746 55.97097
1.5 52.44143 55.4428
1.55 54.34161 54.91911
1.6 56.248 54.39989
1.65 58.16061 53.88514
1.7 60.07943 53.37487
1.75 62.00446 52.86908
1.8 63.9357 52.36775
1.85 65.87316 51.8709
1.9 67.81683 51.37853
1.95 69.76671 50.89063
2 71.7228 50.4072
2.05 73.68511 49.92825
2.1 75.65363 49.45377
2.15 77.62836 48.98376
2.2 79.6093 48.51823
2.25 81.59646 48.05718
2.3 83.58983 47.60059
2.35 85.58941 47.14848
2.4 87.5952 46.70085
2.45 89.60721 46.25769
2.5 91.62543 45.819
2.55 93.64986 45.38479
2.6 95.6805 44.95505
2.65 97.71736 44.52978
2.7 99.76043 44.10899

@BOBBY_G do you have the efficiency formulas for other cobs?

 

[giantsfan24]

Bonjour
You said you want 6 cxb3590 @1050mA for 60% efficiency...an hlg-240-1050b will be fine for this......
CU

Yes it would but I don't think, and I could be wrong, it would be as efficient as a 5 cob, 240-2100 build if my numbers are right. I don't want to spend more money (6 cob's) and get less light, efficiency and everything that comes with it than I could on a 5 cob light.

Now that's providing I'm interpreting the numbers correctly which I may not be lol.

 

[littlejacob]

Yes it would but I don't think, and I could be wrong, it would be as efficient as a 5 cob, 240-2100 build if my numbers are right. I don't want to spend more money (6 cob's) and get less light, efficiency and everything that comes with it than I could on a 5 cob light.

Now that's providing I'm interpreting the numbers correctly which I may not be lol.

Bonjour
You said you want to run 5 cxb3590 @1050mA...an hlg-240-1050b run 5 cxb3590 @1050mA...!???
So what is the problem?
I don't understand?
A 1050mA driver will drive your cxb @1050 so at 61% with a 3500ºk CD and it is the perfect driver for that unless you prefer a parallel wiring!
Series wiring is the simplest and safer way to buid a panel
CU

 

[giantsfan24]

Bonjour
You said you want to run 5 cxb3590 @1050mA...an hlg-240-1050b run 5 cxb3590 @1050mA...!???
So what is the problem?
I don't understand?
A 1050mA driver will drive your cxb @1050 so at 61% with a 3500ºk CD and it is the perfect driver for that unless you prefer a parallel wiring!
Series wiring is the simplest and safer way to buid a panel
CU

The problem was that I wanted to design a 6 cob fixture but with the drivers available, anything that I created would need to run 2 drivers to exceed the light output of the 5 cob design. That could be changing though as Mean Well and Pairui are coming out with 320w drivers. If the numbers look good with 6 cob's on a 320w driver that exceeds the light output of the 5 cob setup, I'll go for that if it's a reasonably efficient option.

 

[sgarcata]

@dionysus4
...
20 COBs * 49W = 980 dissipation W
980 * .563 efficiency = 552 PAR W
552 * .9 lens/reflector/wall losses = 497 PAR W
497 / 3m² = 166 PAR W /m²
166 * 4.65 = 770 PPFD averaged

noobie here.. just joined today and working my way through this thread from page 1 today - incredibly useful info, although my head is swimming with all the acronyms and calcs...

I follow your formula until the last line... where does the 4.65 come from?

Thanks...

 

[ttystikk]

noobie here.. just joined today and working my way through this thread from page 1 today - incredibly useful info, although my head is swimming with all the acronyms and calcs...

I follow your formula until the last line... where does the 4.65 come from?

Thanks...

Me, too- enquiring minds wanna know!

 

[sgarcata]

saw it later at https://www.rollitup.org/t/limos-cxb3590-build.882954/page-4#post-11946074

4.65umol/s/W

 

[sethimus]

that would be the cobs output @ 100% efficiency

 

[sgarcata]

that would be the cobs output @ 100% efficiency

Thanks. (Note: not trying to jam the posts here, but I guess newbies aren't allowed to "thank" with a click... if I'm wrong, please tell me how)

 

[kmog33]

Thanks. (Note: not trying to jam the posts here, but I guess newbies aren't allowed to "thank" with a click... if I'm wrong, please tell me how)

Your right. You need to hit a certain amount of posts or something to like.


Sent from my iPhone using Tapatalk

 

[SilvioBerlusconi]

that would be the cobs output @ 100% efficiency

Nope, what you mean is known as LER. The 4,65umol/s/W is the QER value. You can find more infos in this thread: https://www.rollitup.org/t/math-behind.868988/

 

[Greengenes707]

Nope, what you mean is known as LER. The 4,65umol/s/W is the QER value. You can find more infos in this thread: https://www.rollitup.org/t/math-behind.868988/

No...He was/is correct...actually the most correct since we grow plants not light to see.

LER= Luminous Efficiency of Radiation
QER= Quantum Efficiency of Radiation

Photosynthesis is a quantum process.

 

[Traplife]

Hey @SupraSPL i had a question, if i may, you are obviously extremely knowledgeable on LED grows. I am looking to purchase lights for my flower room and to me LED is seems like the obvious choice, i ran my first grow with a mars hydro panel; and after seeing some DIY LED setups i feel like its right up my alley. I was wondering if you have ever tried to use water cooling systems like the one i installed on my computers CPU. Is it just not worth the investment for the small cooling advantage? Also i was thinking about buying 1500w of LED to cover a 4x4 scrog grow with 8 plants, my original plan was to just reach deep in the pockets and just buy enough panels for the actual wattage to be where i want it; but like i said the DIY route seems much more efficient.

Thanks for your time!

 

[ForRealz]

Hey @SupraSPL i had a question, if i may, you are obviously extremely knowledgeable on LED grows. I am looking to purchase lights for my flower room and to me LED is seems like the obvious choice, i ran my first grow with a mars hydro panel; and after seeing some DIY LED setups i feel like its right up my alley. I was wondering if you have ever tried to use water cooling systems like the one i installed on my computers CPU. Is it just not worth the investment for the small cooling advantage? Also i was thinking about buying 1500w of LED to cover a 4x4 scrog grow with 8 plants, my original plan was to just reach deep in the pockets and just buy enough panels for the actual wattage to be where i want it; but like i said the DIY route seems much more efficient.

Thanks for your time!

I m new to COB's but I can tell you (b/c Ive been researching myself) that you can DIY using high bin CXB3590 COB's run @ .700A passively cooled for 64% efficiency and only use half that wattage while achieving awesome PPFD...
Or, you can spend less on equipment now; but, run lower efficiency, so use more KWH to achieve similar PPFD, increased heat (wasted KWH), more likely to have to actively cool...

 

[Traplife]

I m new to COB's but I can tell you (b/c Ive been researching myself) that you can DIY using high bin CXB3590 COB's run @ .700A passively cooled for 64% efficiency and only use half that wattage while achieving awesome PPFD...
Or, you can spend less on equipment now; but, run lower efficiency, so use more KWH to achieve similar PPFD, increased heat (wasted KWH), more likely to have to actively cool...

im willing to spend about 650. with that much i can get 1300 true watts of mars hydro panels which was my original plan, but if i can get more light/watts (dont care much for efficiency but also willing to spend $ on a good setup) i would be down to go the COB route. How many of those chips are needed strictly to flower a 16 sq ft flower room

 

[Airwalker16]

im willing to spend about 650. with that much i can get 1300 true watts of mars hydro panels which was my original plan, but if i can get more light/watts (dont care much for efficiency but also willing to spend $ on a good setup) i would be down to go the COB route. How many of those chips are needed strictly to flower a 16 sq ft flower room

6-10. Depends on the amperage.

 

[bassman999]

im willing to spend about 650. with that much i can get 1300 true watts of mars hydro panels which was my original plan, but if i can get more light/watts (dont care much for efficiency but also willing to spend $ on a good setup) i would be down to go the COB route. How many of those chips are needed strictly to flower a 16 sq ft flower room

I run 12 chips @ about 1.05A for 370 watts in a 2'x4' (8 ft^2) tent.
most seem to run at 1.4A and that would be less cobs required

 

[Airwalker16]

You could build my exact light for $650.

 

[littlejacob]

im willing to spend about 650. with that much i can get 1300 true watts of mars hydro panels which was my original plan, but if i can get more light/watts (dont care much for efficiency but also willing to spend $ on a good setup) i would be down to go the COB route. How many of those chips are needed strictly to flower a 16 sq ft flower room

Bonjour
Just told us how many gr you want to pull!
1500w in a 4x4...lol!!!!
Yes maybe with mars to get 700gr...lol...if you want 700gr you will need 600w of cxb against 1500w of mars...!
CU