What do I need for my DIY COB??

Airwalker16 said:

Oh damn that's simple as hell. I'm trying to find the 100mm lenses that work over top the chip lok holders. Any idea where you get em? Or is jerry the only way?

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Airwalker16 said:

I really need to know just HOW huge actually. Hopefully I'll get aN answer sooner than later on the diameter from end to end of THAT metal lens holder in inches. I'm guessing around 140mm if the lens is 100 to begin with. So around 5-1/2"?

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PerroVerde said:

Cutter has these
http://www.cutter.com.au/proddetail.php?prod=cut2856

Have you thought about running reflectors instead of lenses? Your going to have a ton of light, are you in a 4 x 4 or 5 x 5?

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littlejacob said:

Bonjour
I have 4 cxb 3590 on an hlg-185-1400b...1 on 5 was for the plant...I meant there was 4 other plants like the one you saw...!
But I will reorder at the end of the month...2 more cxb 200w pannel...and more to come plus a vegg one!
And I will go with kb...cutter do not have some in stock nor drivers so it will be easier to buy everything at the same place...plus his kb reflector 90º at 0.80$ plus the adapter 1.50$ I guess...it will be nice!
CU

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PerroVerde said:

I would order 3 of them (one for each driver) and they are cheap. There are three prongs/points to connect wires. There will be a two wire lead on the hlg 185 1400B (white and blue) for dimming. White to the center prong, blue to the left prong if your looking at the potentiometer with the connecters/prongs down or facing you.

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flexy123 said:

It's actually "relatively" simple with the drivers.

Look up the specs of the COBs, say, the CXB3070 or CXB3590. The CXB3070 in general are run under-driven at 50W.
So if you have a fixture with 4 lights you want to run a 50W, you need a 200W driver.
(In this case for 50W per COB you run them 36Vx1400mAH), so the driver must be 1400mAh and 144V (36V x4), assuming you have the 36V LEDs. (Watts = V*Amps)

CXB 3590 you can also run at 1400mAh but personally I think it makes more sense to run them at 1600-1750mAh, is 36Vx1750mAh == 63W for each 3590. Fixture with 4x 63 = 252W, in this case you'd want a 250W driver that can provide 1750Mah.

* This means also if you want to run COBs at 50W (or 60ish for the CXB3590), usually ONE driver can be good up-to 4 COB, more COBs = more drivers. Eg. fixture with 8 COBs 2 drivers.

TLDR: Check COB specs, think at what W you want to run each COB and what W makes sense, this will tell you what type of driver(s) you will need.

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