CXA3050-0000-000N00W430F as a possible led choice?

[Abiqua]

That means you are going to run about 30 watts each to the cobs?

actually about 42 watts each after losses....Kill a watt says 126 watts

2x Cxa3070 AB's
1x Vero29 3k

Cant decide which direction I want to fill out the tent..

Probably Vero29's for the prices. Love cree, but $27 is tough to beat. Might have to scope Verical and see if some CXA'3070s are floating around.

 

[bassman999]

actually about 42 watts each after losses....Kill a watt says 126 watts

2x Cxa3070 AB's
1x Vero29 3k

Cant decide which direction I want to fill out the tent..

Probably Vero29's for the prices. Love cree, but $27 is tough to beat. Might have to scope Verical and see if some CXA'3070s are floating around.

I was actually looking again at the veros, and had yet another question
I see some of the Vero 29 Array series listed as 4.2A max and others listed as 3.15A max.
Which is the better one to get?
I was looking at these, I could get 4 for less than 3 of the CXB3070s.
http://www.digikey.com/product-detail/en/BXRC-30E10K0-L-23/976-1253-ND/5180225

 

[bassman999]

There are no good combinations for 3 or 4 2.1 amps from the HLG series drivers. You could run 1 each on LPC-100. 2 would fit on a HLG-185H-C2100 except there's no such thing.

When HLG-240H-C1750 is available it will run 3, but 1.75 amps not 2.1.

Vero just isn't HLG friendly.

How about running this with a pot
http://www.mouser.com/ProductDetail/Mean-Well/RSP-320-36/?qs=VJiV0ukI%2bQhoD/wS/nYLxA==

 

[Abiqua]

I was actually looking again at the veros, and had yet another question
I see some of the Vero 29 Array series listed as 4.2A max and others listed as 3.15A max.
Which is the better one to get?
I was looking at these, I could get 4 for less than 3 of the CXB3070s.
http://www.digikey.com/product-detail/en/BXRC-30E10K0-L-23/976-1253-ND/5180225

I believe the 3.15 max might have been Version 1??
Maybe you can drop that link specificially?

I just picked up 4k versions of your 3k link^.....not as efficient as an low undriven CXB, but also less cost and rock solid. Evens out in my book.

 

[bassman999]

I believe the 3.15 max might have been Version 1??
Maybe you can drop that link specificially?

I just picked up 4k versions of your 3k link^.....not as efficient as an low undriven CXB, but also less cost and rock solid. Evens out in my book.

I am probably going to being running them harder than the efficient point, so wasnt sure the CXB was best option
http://www.digikey.com/product-search/en?s=48361&k=BXRC-30&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25
I was looking at chart and comparing them, most arent in stock, but it shows the max current for them deviating

 

[bassman999]

I am guessing there is more to cob efficiency than just the Lm/W number specified by the MFG?
Otherwise I see the Vero 29 being way more efficient than the CXA3070

 

[Abiqua]

I am guessing there is more to cob efficiency than just the Lm/W number specified by the MFG?
Otherwise I see the Vero 29 being way more efficient than the CXA3070

They are about the same actually., especially from 1400ma of current and below..the 29 [especially V.2] and CXA3070
Vero's can compete with the CXB's for Higher Current efficiency at less than HALF the cost...thats where Vero's have the best sweet spot imho....

but the CXB3590 trumped everybody with raw numbers...
However, the actual energy umol per joule [3k color temp], may favor the Vero's....but not by much...buts its enough to brag about it

Vero's are a plus when driven harder....2.1 amps and still 40% efficient. They are easy to cool and run like bulldogs. [ok bad analogy...probably, more like..."fight" like bulldogs, lol...]

 

[bassman999]

@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?)

So does this mean that 100"^2 is what is needed to passively cool 75W?
If thats is true then 8"x28.75" should passively cool 172.5W?

 

[bassman999]

They are about the same actually., especially from 1400ma of current and below..the 29 [especially V.2] and CXA3070
Vero's can compete with the CXB's for Higher Current efficiency at less than HALF the cost...thats where Vero's have the best sweet spot imho....

but the CXB3590 trumped everybody with raw numbers...
However, the actual energy umol per joule [3k color temp], may favor the Vero's....but not by much...buts its enough to brag about it

Vero's are a plus when driven harder....2.1 amps and still 40% efficient. They are easy to cool and run like bulldogs. [ok bad analogy...probably, more like..."fight" like bulldogs, lol...]

View attachment 3537833

I am having so much trouble deciding what to get...
I cant decide if I want to be super efficient (CBX3590), and build a light setup over the next yr lol, or go (Vero) and run harder and less efficient and have enough watts to flower now.

 

[bassman999]

When referring to the CXA3070 Bin AB which chromacity region is better the 2 step or 4 step?
30H or 30F?

 

[Abiqua]

I am having so much trouble deciding what to get...
I cant decide if I want to be super efficient (CBX3590), and build a light setup over the next yr lol, or go (Vero) and run harder and less efficient and have enough watts to flower now.

Its been a long road myself...almost 2 years at just LED and learning more everyday...the method I gravitate towards is going for the best efficiency that I can afford...sometimes the scales are slightly out of balance maybe towards more OVerall output, or sometimes more efficiency...I look for achieving:15 Par watts/sq ft of power as a baseline...... especially if flowering over a foot or two in height, regardless of the amount of efficiency....If they are 50% efficient vs. 40%, then that might be a jump worth going for....My opinion is greater efficiency allows reduced wattage, if sticking by the 15 PAR watt "rule of thumb"....

I would say, the drivers are your heart first....Drivers tech has been around much longer than the COB, at least in production and wont improve much...not enough to warranty replacing every year...the Meanwells have 7 year? warranty's the HLG models at least...and I believe with good maintenance you will easily get to that time mark with out replacing a Driver.

The 3590 is the gem right now and the price has come down, so it isn't a bad time to buy. I bought CXA's about 14 months ago for $40 a pop and sometimes its tough to look, when the CXB's came out just a few months later...and now are sometimes less than $40 apiece....The COB's are the CPU of this decade I guess, they are changing fast and furious....but I am super stoked on my light and plan to run it for as long as I can....I can adapt it to ANY size space in reality...with enough cashola I guess

 

[Abiqua]

When referring to the CXA3070 Bin AB which chromacity region is better the 2 step or 4 step?
30H or 30F?

I forget which one is closer the 2 or the 4....but basically not everything is 3000K...in fact its probably rare to get a diode putting out 3000k right on the nose....so there are differences in the bin, minimal 1/100 to 1/1000 of a % in terms of color temp difference....3053K vs 3049K for example.

Which ever way it works either the 2 or 4 guarantee that the color temperature is "closer" to actually being 3000k....so you might score two that are the above K^ and maybe the other step process gives you a 3140K color temp diode....

Small imperceptible differences really especially to the Eye, only accurately measured with a spectrometer is my guess.

 

[bassman999]

HLG-185H-C1400B is the driver I am going with and CXA3070s 3000K and AB bin are the cobs I am getting if the price comes back as I hope it will.
I think Jerry is off on the weekend as he hasnt emailed back.
Either that or he got tired of giving me quotes lol.

I guess if they change all the time and I am already a step behind thats not too good, but I think Ill still be 2 steps ahead of where I am.

 

[bassman999]

I dont even have a real grow area right now.
I am just vegging on my weight bench in 3 gal cloth pots sitting in a cement mixing tub.
I am trying to think of a way to have walls around them that can be taken down in a hurry.
Maybe make a cabinet that doesnt look suspicious...

 

[bassman999]

HLG-240H-42
I am hoping Jerry has this one since the other one HLG-185H-C1400 isnt compatible.

 

[bassman999]

HLG-240H-36A
Looks like this is adjustable up to 38.5V
Tech at mouser says it is better choice than he HLG-240H-42

Buy he said something that seems to conflict with what I hear here, and that is that the cobs get mad with under-driving their current.
He was saying that the CXA3070 is rated at 38.5V @1.925A and they dont like to run under that current.
Basically dont drive 5 in parallel, but limit it 3 in parallel.

Does anyone have any rebuttal to this?

 

[nevergoodenuf]

I have 4 in parallel right now, but I think that all depends on how many watts you are running through them. I run mine less than 50 watts each. I plan on getting the HLG240 with my next order but plan on trying these http://www.digikey.com/product-detail/en/NX300160/1061-1155-ND/4215392-36 .

 

[bassman999]

I have 4 in parallel right now, but I think that all depends on how many watts you are running through them. I run mine less than 50 watts each. I plan on getting the HLG240 with my next order but plan on trying these http://www.digikey.com/product-detail/en/NX300160/1061-1155-ND/4215392-36 .

Ive never seen those before.
Looks like temp controlled PWM fan housed in a starburst shaped heastsink.
Interesting.

 

[bassman999]

Jerry told me no Chino post option for 5 cobs and 1 driver
So $45 on postage wow

 

[bassman999]

http://www.parts-express.com/sure-electronics-36-vdc-97a-350w-regulated-switching-power-supply--320-3141?utm_source=google&utm_medium=cpc&utm_campaign=pla
I wonder if this would be any good on a half dozen or so cobs in parallel?
http://www.parts-express.com/sure-electronics-36-vdc-97a-350w-regulated-switching-power-supply--320-3141?utm_source=google&utm_medium=cpc&utm_campaign=pla