CXB3590 1500W

Pleasant Peasant

Pleasant Peasant

Active Member
Worms be the tillers of the earth and my soul.
Moving back home to cow country has it's benefits ;)
Got the soil game figured out. Time to master the sun via Cobs.

Some good vibes for this Cob crew !!!
Seriously... thank you Supra for being the catalyst and getting a bunch of like minded individuals together.

Happy Caturday m8's !!

 
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BOBBY_G

BOBBY_G

Well-Known Member
bassman999 said:
I have several flavors of cobs now, and am working on getting more to experiment with.
I am flowering in a 24"Dx48"Wx60"H tent
(6) CXA3070 AB 3000K
(2) CXB3070 BB 3500K
(4) CXB3590 CD 3500K
(1) CXM-32 3000K
(1) CXM-32 3500K
(2) HLG-240H-42B drivers
I am working on a design to use them all or most of them while keeping them 50% efficient, and even higher in the case of the cxb cobs
This means th CXAs need to be run at 25W each or less

A lil comparison between the CXM-32 Luminus, and the CXB3590 Cree"


CX B3590: at 85C, 2.4A 12,500 lumens, at 50C 13137 lumens

CX B3070: at 85C, 1.925A 9750 lumens, at 50C 10486 lumens


The Luminus CXM32 per the data sheet is:

Min flux of 14545 at 85C, 2.640A

This would translate to approx:

13,381 at 2.4A and 11054 at 1.925A

At 50C should be:

14,451 at 2.4A and 11938 at 1.925A


Efficacy would be:

Cree CXB3590: 13137/(36*2.4)=152

Cree CXB3070: 10486/36*1.925)=151

Luminus CXM32: 14451/(52*2.4)=115
Luminus CXM32: 11938/(52*1.925)=119

Cree CXA3070: 8750/(39*1.925)=123
Click to expand...
Not really a fair fight
-you are comparing CXB3590's *average* (middle of bin) flux with luminus's *minimum* stated flux
-you are comparing 80 CRI CXB3590 with the 90CRI CXM32
-the voltage you are using for 1.925A is a bit high, should be ~51.25 per datasheet (extrapolating off scale)

heres what i get:

(lets look at CXB3590 *minimum* flux)
CX B3590: at 85C, 2.4A 12,000 lumens, at 50C 12611 lumens
Cree CXB3590: 12611/(36*2.4)=146

The Luminus CXM32 per the data sheet is:
Min flux of 16880 at 85C, 2.640A

(at 77% flux per datasheet) This would translate to approx:
12829 at 1.925A

(at 108% per datasheet)At 50C should be:
13894 at 1.925A

Luminus CXM32: 13894/(51.5*1.925)=140

not too shabby.that same cob also runs up to 200W vs cree's 140

wish they were cheaper/more available. i just got a few dozen 3590s from cutter for $42 shipped (+$8 more for holders/adapters/reflectors)

$30+shipping (+tax?) in min 100 lot aint all that screamin of a deal unless you need to push these to the limit (where any gains are diminished after driver and heatsink cost)
 
bassman999

bassman999

Well-Known Member
I can get the CXM-32 for $28 plus ship. They dont sell low qty normally, but they made an exception for me to "test" them
Not sure they are as efficient as that though
I am running my Luminus at 700 mA, because that the driver I have that will work with them.
My other drivers are HKG-240H-42B
 
R

Ryan70c10

Member
Question for you smart LED cob guys. Hlg-120h-c350 could run 16 vero 10s in a 4*4 tent for veg. Would that be good veg light or not. Thinking I could space them out for 1 per square foot at 9.356 watts. What is PPFD to thanks
 
littlejacob

littlejacob

Well-Known Member
Ryan70c10 said:
Question for you smart LED cob guys. Hlg-120h-c350 could run 16 vero 10s in a 4*4 tent for veg. Would that be good veg light or not. Thinking I could space them out for 1 per square foot at 9.356 watts. What is PPFD to thanks
Click to expand...
I am not that smart but I would go for cxa2530 or V13 if you want to space them 1foot apart!
V10 are too "light" imo!
V13 @500mA are 16w and 32V so the minimum per sq/ft for a good vegg!
I saw some grow under V10 and it was a bit stretchy...or you will need twice the number you thought and at higher intensity...jmo!
Cxa2530 are 8/9 $ in cutter and kb!
What final size do you want at the end of vegg cycle?
Do you have cxb3590 3500ºk?
Do you have a vegg and a bloom tent?
CU
 
giantsfan24

giantsfan24

Well-Known Member
SupraSPL said:
Here are some units you could scale up to fit your space. To some extent, you can adjust the coverage by adjusting the distance to canopy.

@45.7%
(2) CXB3590 3500K CD 36V @ 2.5A (91.65W ea) $95
(2) HLN-80H-36A $90
183 dissipation W -> 99.37W heat
(2) Arctic 64 Plus CPU coolers $26
(2) lenses $8
83.63 PAR W covering 5 ft² = 749 PPFD
$219 = 2.62/PAR W

@49.7%
(2) CXB3590 3500K CD 72V @ 1.05A (75.5W ea) $95
(1) HLG-185H-C1400 (running at ~1050mA) $65
151 dissipation W -> 76W heat ->
passive cooled heatsink 9120cm² -> (2) 10"X10" heatsink $75
or
active cooled heatsink 3040 cm² min -> 3.5" X 30" heatsink (for spread) $40 + 80mm fan+psu $10
or
(2) Arctic 64 Plus CPU coolers $26
(2) lenses $8
75 PAR W covering 4ft² = 840 PPFD
75 PAR W covering 5ft² = 672 PPFD
$243 = $3.24/PAR W passive cooled
$218 = $2.91/PAR W active cooled on bar heatsink
$194 = $2.59/PAR W active cooled on CPU coolers (uniform spread, best value?)

@ 56.3%
(4) CXB3590 3500K CD 36V @ 1.4A (49W ea) $190
(1) HLG-185H-C1400 $65
196 dissipation W -> 85.7W heat ->
passive cooled heatsink 10284cm² -> 5.88" X 38" heatsink $72 (could split in 2 to improve uniformity/spread)
or
active cooled heatsink 3428cm² min -> 3.5"X36" heatsink (for spread) $45 +80mm fan +psu $10
(4) lenses $16
110.3 PAR W covering 6ft² = 824 PPFD
$311 = $3.07/PAR W passive cooled (great value point IMO, very efficient use of driver)
$326 = 2.96/PAR W active cooled

@61.2%
(5) CXB3590 3500K CD 36V @ 1.05A (35.5W ea) $237.50
(1) HLG-185H-C1050 $65
177.5 dissipation W -> 68.9W heat ->
passive cooled heatsink 8268cm² -> 4.9"X36" $70
or
active cooled heatsink 2756cm² -> 3.5"X36" heatsink (for spread) $45 + 80mm fan + psu $10
(5) lenses $20
108.63 PAR W covering 6ft² =
$392.50 = $3.61/PAR W passive cooled
$377.50 = $3.48/PAR W active cooled

@64%
(8 ) CXB3590 3500K CD @ 700mA (23W ea) $380
(1) HLG-185H-C700 $65
184 dissipation W ->66W heat ->
passive cooled heatsink 7920cm² -> 4.23"X44" $68 (could split these into 2 or 4 units)
or
active cooled heatsink 2640cm² -> 3.5"X36" heatsink (for spread) $45 + 80mm fan + psu $10
active cooled heatsink 2640cm² -> 1.8"X44" heatsink $34 + 80mm fan + psu $10
(8 ) lenses $32
117.8 PAR W covering 6ft² = 879 PPFD
117.8 PAR w covering 7ft² = 754 PPFD
$545 = $4.63/PAR W passive cooled (great option if your area is high electrical cost, Hawaii, NYC, SoCal etc or if your grow is already heat limited and you want to increase yield without running more AC, ducting and fans)
$532 = $4.52/PAR W active cooled 3.5"
$521 = $4.43/PAR W active cooled 1.8"


So in summary, the higher the efficiency goes, the more appealing passive cooling is. Less wires, less moving parts, less points of failure for about the same cost.
Click to expand...
So what's the best 6 cob recipe??
 
giantsfan24

giantsfan24

Well-Known Member
Airwalker16 said:
In what aspect?
Click to expand...
Supra put together some build recipes based on efficiency, it appears, but jumps from 5 cob build to 8. For my purposes, it looks like any way I go, the 5 cob fixture is less flexible design wise but more efficient running wise than a 6 but I'm sure I haven't taken everything into account. I don't know what I don't know. :-)
 
ttystikk

ttystikk

Well-Known Member
giantsfan24 said:
Supra put together some build recipes based on efficiency, it appears, but jumps from 5 cob build to 8. For my purposes, it looks like any way I go, the 5 cob fixture is less flexible design wise but more efficient running wise than a 6 but I'm sure I haven't taken everything into account. I don't know what I don't know. :-)
Click to expand...
Boy do I know how that feels lol
 
giantsfan24

giantsfan24

Well-Known Member
ttystikk said:
Boy do I know how that feels lol
Click to expand...
I want to build a fixture just like @bizfactory has: two bars, 5.88, with space between them for the driver and boxes, very clean. Works for spread as well.

I spec'd out 6 cob's and a 240-1050 but it came out to be not as effective as the 5 cob light with a 240-1400. It would be fine if they were equal but it doesn't appear that they are. That said, I don't know if I'm figuring this out properly.
 
ttystikk

ttystikk

Well-Known Member
giantsfan24 said:
I want to build a fixture just like @bizfactory has: two bars, 5.88, with space between them for the driver and boxes, very clean. Works for spread as well.

I spec'd out 6 cob's and a 240-1050 but it came out to be not as effective as the 5 cob light with a 240-1400. It would be fine if they were equal but it doesn't appear that they are. That said, I don't know if I'm figuring this out properly.
Click to expand...
Alas, I am not an expert, either. I know just enough to recognize a given recipe's strengths and choose from there. Lots of people can help you with your conundrum, there's a thread about COB LED and how to power them. Best place I can think of to ask that question.
 
klx

klx

Well-Known Member
giantsfan24 said:
I want to build a fixture just like @bizfactory has: two bars, 5.88, with space between them for the driver and boxes, very clean. Works for spread as well.

I spec'd out 6 cob's and a 240-1050 but it came out to be not as effective as the 5 cob light with a 240-1400. It would be fine if they were equal but it doesn't appear that they are. That said, I don't know if I'm figuring this out properly.
Click to expand...
Thats because 6 cobs on a240-1050 is running at 1050mA and 5 cobs on 240-1400 are running at 1400mA. You need to start with the the size of your space and work backwards. More cobs run at a lower current is better for spread and efficiency but less cobs run at a higher current is cheaper start up.
 
giantsfan24

giantsfan24

Well-Known Member
klx said:
Thats because 6 cobs on a240-1050 is running at 1050mA and 5 cobs on 240-1400 are running at 1400mA. You need to start with the the size of your space and work backwards. More cobs run at a lower current is better for spread and efficiency but less cobs run at a higher current is cheaper start up.
Click to expand...
I've worked it "backwards" as you say and the best setup is a design like @bizfactory but 5 cobs on two bars, which is a great option spec wise, seems uneven spread wise.

My other option is to have two drivers running 3 each which does work but it's not the most cost effective option.

It's funny to me that virtually every option seems easy except for 6 cob's lol.
 
Bachomp

Bachomp

Well-Known Member
giantsfan24 said:
I've worked it "backwards" as you say and the best setup is a design like @bizfactory but 5 cobs on two bars, which is a great option spec wise, seems uneven spread wise.

My other option is to have two drivers running 3 each which does work but it's not the most cost effective option.

It's funny to me that virtually every option seems easy except for 6 cob's lol.
Click to expand...
Couldn't you just use two 185s instead of a single 240? And use 1400s with dimmers?
EDIT: I'm baked and see now that you said it's not cost effective. I think using two drivers will give you more flexibility for future upgrades!
 
klx

klx

Well-Known Member
giantsfan24 said:
I've worked it "backwards" as you say and the best setup is a design like @bizfactory but 5 cobs on two bars, which is a great option spec wise, seems uneven spread wise.

My other option is to have two drivers running 3 each which does work but it's not the most cost effective option.

It's funny to me that virtually every option seems easy except for 6 cob's lol.
Click to expand...
Yeah if you are set on only 1 driver it limits you a bit. You could use 2 HLG-120H-C1400 with 3 x 3590s on each. They are a bit cheaper.
 
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