Fanleaf's Huge 42 COB Array Build Plus Other Builds

Fanleaf's Huge 42 Cree CXB3590 COB Array Build Plus Other Builds

But depending on where you are getting good heatsinks may be a problem. Easy to get in North America not so much in Europe.
You'll need some SST 105mm fin pin heat sinks.
420-magazine-mobile2067561171.jpg
these are predrilled for Vero 18 without the ledil clamp so if you want reflectors you'll need the clamp which means you have to tap your own holes.
420-magazine-mobile136736540.jpg
 
totalnoob said:
Would you suggest reflectors? I'm in the Northeast USA. These will mostly be used for starting plants before they go outside.
Click to expand...

If you want strictly veg I'd go with the 5000k Vero 18. Its more efficient and provides a higher luminous output. It also stays much cooler. Reflectors do increase luminosity (and PAR) by almost 50%. So if you want to take full advantage of the chip I would strongly recommend reflectors. You can get the chip and holder (Ledil vero 18) from digikey. But they don't carry Ledil Angelina reflectors. Can you see if future electronics is available in the US? They carry the chip, holder and Angelina reflectors at a really good price.
Robin at Northern Grow lights has the 105mm heatsinks in stock. They're really cheap too.
 
Hey guys, I have a quick question.
I have this 2 cob fixture I got from the rain forest.
It's rated at "400w" in reality it says it's closer to 200w.
I want to replace the 2 cobs with better quality ones, basically a straight across swap. Fanleaf told me I could use a couple Cree 3070's or even 3590's.
But I am just wondering if there are any less expensive options before pulling the trigger on the Crees.

Here are a few pics.
420-magazine-mobile2140207332.jpg

420-magazine-mobile1233944262.jpg

420-magazine-mobile1628979198.jpg


They're driven by 4 drivers, 2 per cob.
28-36v at 1200mA. I believe parallel, right? Lol.
 
Fanleaf's Huge 42 Cree CXB3590 COB Array Build Plus Other Builds

TWINTURBODOGO said:
Hey guys, I have a quick question.
I have this 2 cob fixture I got from the rain forest.
It's rated at "400w" in reality it says it's closer to 200w.
I want to replace the 2 cobs with better quality ones, basically a straight across swap. Fanleaf told me I could use a couple Cree 3070's or even 3590's.
But I am just wondering if there are any less expensive options before pulling the trigger on the Crees.

Here are a few pics.
420-magazine-mobile2140207332.jpg

420-magazine-mobile1233944262.jpg

420-magazine-mobile1628979198.jpg


They're driven by 4 drivers, 2 per cob.
28-36v at 1200mA. I believe parallel, right? Lol.
Click to expand...

Hmmmmmmmm.
I don't trust those drivers. You should measure their actual output. The last time I told someone to run a chip off one of those drivers according to the advertised currant it didn't work. It said 72v on the driver but wouldn't power a 69V chip. I have little faith in Chinese no name drivers.
 
Fanleaf's Huge 42 Cree CXB3590 COB Array Build Plus Other Builds

TWINTURBODOGO said:
Yes for right now I need to keep the drivers. Until I can afford to build a new fixture and reuse the cobs.
I do not have a multimeter.
Click to expand...

Fanleaf is the rebuild expert and he'd be able to help you better. According to your info..two drivers per cob at 36 v at 1.2 amps is 72v at 2.2 amps per cob. That's seems a tad unrealistic for an Epistar chip. I'm sure the amperage is probably lower.
 
Fanleaf's Huge 42 Cree CXB3590 COB Array Build Plus Other Builds

But if those drivers are correct you can run 4 Vero 29 D series SE solderless chips for about $100 USD for all 4 chips at a reasonable 43.2w per chip. About 32000 lumens combined. If it doesn't work you have 4 chips that will run on a $50 HLG-185H-C1400 perfectly at around 36,000 lumens and 51w per cob.
 
Fanleaf's Huge 42 Cree CXB3590 COB Array Build Plus Other Builds

Probably. The Chinese have a reputation for overstating things. If it's 600mA per driver then you can run two Vero SE D series. Just swap them in the way they are. You'll have to solder some 20 awg wire (or 18awg thin wall) onto those ends to fit in the Vero SE connectors. There's a video on YouTube that explains how to do it. The SE has 2+ and 2- ports so just plug and play. $50 for 2 chips.
420-magazine-mobile521670813.jpg
 
@JimmyJames905

I've been looking into COB because HID and all these fans and ducting are a pain in the ass, plus the waste of electric..

I just need you to answer me something buddy please?

I have a 4x4 text with some cuttings doe soon..

I have MH/HPS 600w but they tried my seedlings absolutely devastated.

I know I need 1 per door squared so approx 16..

Was thinking 4x4 rails with 4 cobs on

5xCLU048-1212C4-353H6K2
CRI 90 @117.5W for £42 delivered (I'd get 20 4 as spare ext.

I know I'm gonna need L-shape aluminium (I'll sort that)

What I need help with is; (with your experience)

Which holders
Do I need reflectors?
And which Meanwell drivers so I can dim them and run them efficiently or and them if I want to.

1 driver per 4x117w but ran at 50% or less or more.

And I'm gonna need 4 of these..

Which driver please mate cos I'm just finishing days and I'm shattered and I'll watch all Growmau5 when I'm on nights tomorrow..

Just want to know the budget

Individual heatsink? Cheap active amazon heatsink?

Any tips and help be appreciated..

I'm doing coco now under HID & I SERIOUSLY want a 16 cob light to grow a mental yield.. and save a fortune ..

Hope you get back x
 
Hell ya thanks JimmyJames, this light has been a decent little light.
I'm confused now though.
The drivers say they're 1.2A but the site says the whole fixture runs at 600mA.
Can four 1.2A drivers be wired in series or parallel to make 600mA?
Or is the manufacturer description wrong?
Is be more inclined to believe the label on the drivers and not what the site description claims.
 
Clu1212, 3500K, Meanwell 240/1050. Mine runs 6 of them. Total 270W... So its a lilbit more then expected. (killawatt)

Maybe a 185/1050 will run 5 at 40W each... Jimmy knows for shure.

But i would grab 9x vero 29 D instead of the CLUs and run them at at higher wattage. Maybe 3x3 on 3x240/1750 for total 720W.

3x5000K and 6x3000K would be pretty good. 240W of 5000K are pretty efficient and the other 480W are a nice boost for flower
 
GroActive said:
@jimmyjames905

I've been looking into COB because HID and all these fans and ducting are a pain in the ass, plus the waste of electric..

I just need you to answer me something buddy please?

I have a 4x4 text with some cuttings doe soon..

I have MH/HPS 600w but they tried my seedlings absolutely devastated.

I know I need 1 per door squared so approx 16..

Was thinking 4x4 rails with 4 cobs on

5xCLU048-1212C4-353H6K2
CRI 90 @117.5W for £42 delivered (I'd get 20 4 as spare ext.

I know I'm gonna need L-shape aluminium (I'll sort that)

What I need help with is; (with your experience)

Which holders
Do I need reflectors?
And which Meanwell drivers so I can dim them and run them efficiently or and them if I want to.

1 driver per 4x117w but ran at 50% or less or more.

And I'm gonna need 4 of these..

Which driver please mate cos I'm just finishing days and I'm shattered and I'll watch all Growmau5 when I'm on nights tomorrow..

Just want to know the budget

Individual heatsink? Cheap active amazon heatsink?

Any tips and help be appreciated..

I'm doing coco now under HID & I SERIOUSLY want a 16 cob light to grow a mental yield.. and save a fortune ..

Hope you get back x
Click to expand...

The last Cree i built used 4 x 36v Cree on a HLG-240h-c1750b. Best price on your side of the pond is Cutter electronics. You can buy gromau5 kits there. The cob holders you're looking for are called BJB holder.
Here's the vid I made.
PAR testing COBs - Cree CXb3590 6500K - YouTube
 
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