REALSTYLES 6th DIY CXA 3590 5000k DB bin

OneHitDone

OneHitDone

Well-Known Member
H

HellTazer

Active Member
can i use that ebay china led drivers with that cxa 3590's? i mean that with open heatsink like the pcs power supply back?
 
C

Checkit71

Active Member
So i have to ask who do you guys email for contact at kingbrite for the CXA3950's. I went to their Ali page and it does not have any thing listed on their page besides lens. I am looking to make one of these exact same build and digi has these cobs listed at $47 wanted to see if i can get these any cheaper
 
werm11

werm11

Well-Known Member
sanjuan said:
I think the COB companies smacked down Kingbrite, the page does indeed only show lenses now.

Jerry started sending out a weekly email showing Cree inventory to customers.
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So we can still get them? I was about to order 12 of them from him soon
 
sanjuan

sanjuan

Well-Known Member
[My first email was a week ago today. I'm waiting for today's mailing. (I've almost talked myself into COB 5K vegging lights because they will fit the space better than the current 4ft tubes.)]

Dear Valued customer,

Nice day!
I am Jerry from KingBrite, it is my pleasure to support you.

I am writing to update you our latest stock for Cree CXB leds and Vero29 V2 leds, so you will know what we have in stock now.

CXA3070 and CXA3590: [Details didn't copy to forum]

CXB3070 and CXB3590:

Vero29 V2:

I will update the stock list every week, If you don't want to get this email, pls feel free to tell me, I will delete you from the info list.

Hope everything goes well for you!



Best regards
Jerry Meng

Sales Manager
 
sanjuan

sanjuan

Well-Known Member
Sorry about the stoner thoughts earlier, Jerry is still slinging COBs from the same storefront as before. I just ordered a dozen CXB3590 5000K 36V CD. Ten bucks apiece cheaper than Mouser (including delivery) with 9% more flux @ 85C (12,000 lm).

Edit: The 4.5% merchant Paypal fee is now applied to the invoice so the China price advantage is $7.50 per unit, delivered--but the Mouser part is only CB bin (11,000 lm).
 
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silvrsurfer77

silvrsurfer77

Well-Known Member
REALSTYLES said:
fucking murdered Mars grow lol
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I really enjoyed that video lol....I used mars once and sold em, I thought they were good at the time tho.......boy was I mistaken.

but to contribute to the thread heres my first build...

Courtesy of SupraSPL

@ 56.3%
(4) CXB3590 3500K CD 36V @ 1.4A (49W ea) $190
(1) HLG-185H-C1400b $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


Im doing 3 of these passively cooled for a 4x4x6 tent and only using 36" long heatsinks....all 3500k CD

And then Im doing one of these on (2) 5.8" x 20" heatsinks for a 2.5x.2.5x4 tent with two 5k CD and two 3500k CD

waiting on the cobs from kingbrite still......So excited!!!! Sux I have to wait about a month or so to use them, moving to Colorado :)
 
green217

green217

Well-Known Member
green217 said:
just bumped into this thread tonight, good looking out realstyles! I appreciate you documenting your 6th DIY COB fixture. .
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I gotta build myself a veg light at least, I want to build a 1000w HPS killer myself, but I don't gave a G I can put into it right now. I have been hoping the prices will drop soon on the COBs but they are holding their value so far. Need to build a veg light that will keep my nodes tight enough for my 1000w DE that i use in flower, until I get a COB fixture built to replace the DE.
 
green217

green217

Well-Known Member
I envy u so much. I want/need one badjy. The heat is the biggest problem I have with a DE open fixture I have to run a 8000btu window to keep things at optimal temps and that's killing my power bill bad! But I'm going to start with a veg lite build so I will be more comfortable with the heatsink work. Any advice u or anyone else that has built a cob would be great! How many 3095's should I use and at what spread to get my plants noded up rightly for a 1000w flowering light? If I went passive, what size heat sinks should I use. Hook a fellow grower up with some knowledge so I can have a nice veg lite.

Happy growing,
Green217
 
silvrsurfer77

silvrsurfer77

Well-Known Member
churchhaze said:
Yep, the max voltage output is 300V, which divided by 4 gives 75V room per cob (some slack there). Those drivers are 94% efficient with active power factor correction, are dimmable with a trim pot under a rubber plug.
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how do you calculate the max voltage output? says its 200w max output power at .7a .....so I thought 200w/.7a = 285v would give you 71v a cob ? Am I right ? were you just estimating...Im still learning
 
silvrsurfer77

silvrsurfer77

Well-Known Member
REALSTYLES said:
I use 72v and get the same efficiency. I just use 700ma and I dim them during the summer to 350ma but I have the option to get a 1400ma driver but would lose on efficiency but more light and it would still kill an hps

View attachment 3494277
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Just curious when you say kill an hps, I know the efficiency obliviously is way better, but what wattage hps would compare with one of these as far as par or umols?
 
alesh

alesh

Well-Known Member
silvrsurfer77 said:
how do you calculate the max voltage output? says its 200w max output power at .7a .....so I thought 200w/.7a = 285v would give you 71v a cob ? Am I right ? were you just estimating...Im still learning
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Data sheet...not that hard, is it?

silvrsurfer77 said:
Just curious when you say kill an hps, I know the efficiency obliviously is way better, but what wattage hps would compare with one of these as far as par or umols?
Click to expand...
Since a HPS produces a very similar number of photons per each joule emitted, the difference in emitted photons is proportional to the difference in efficiency.
 
silvrsurfer77

silvrsurfer77

Well-Known Member
alesh said:
Data sheet...not that hard, is it?


Since a HPS produces a very similar number of photons per each joule emitted, the difference in emitted photons is proportional to the difference in efficiency.
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The link doesnt work....I still want to understand how to calculate things myself. Being able to read a chart doesnt give understanding to how get the number....what if you cant find a chart lol....or the links broken ;P

Was my math wrong there? I need to be able to figure out these things to come up with my own led/driver combos. Right now my first build is based off supraspl's posts (12) cxb3590 3500k 36v on 3 HLG-185h-c1400b. So for one driver w/ (4) 36v cobs is 144v. 200w max output / 1.4amps = 142.8v....it seems that Im a little off or its normal to be off by a couple volts? lol

Also I guess I should rephrase the question, what kinda hps are we would this be comparable to ? a 600w hps?
I know 600w hps would be adequate to light a 3x3 or 4x4 foot print. So roughly what footrpint would be reasonable with this light?
 
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