Fanleaf's Huge 42 COB Array Build Plus Other Builds

JuanCarlos said:
Fanman, for someone who isn't worried about power consumption and planned to run them full blast (50W) per COB, in a 4x4 would you suggest a 12 COB panel or would you go the extra mile and still do a 16 COB array?
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If consumption isnt the main concern you could easily go with 12. Actually you could go a few less in that situation. You don't have to stop at 50 watts per cob either. These are 137 Watt chips. 80 per chip is still easy on them.
 
OK guys....1 day project here. Heres the Mars Hydro 100W UFO light to Vero 29 7th generation 4000k cob swap. Spent an hour on it the other day and about 3 hours today. It's done, ready and runs cool.

Here we go!!

I had this light laying around for quite some time. I used it a bit when I first got it but was disappointed with plant growth and coverage. It was filthy when I started but at the end of this project....well, you'll see!

Opened the thing up to see what I was working with.
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Looks like we can use the small 12v fan driver so that's a keeper. I started disassembling the light while trying to figure out if I could use 1 of the 2 actual LED drivers in there. I decided not to because even though it is a 50-100v driver and we are using a 50 volt cob I want the option to run it really soft I need it to be able to run at a lower voltage around 45-46 as well. The driver also maxed out at 550-600mA so that wouldn't be good enough for the top end I want either.
So back to the tear down.
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I decided I could actually use the aluminum LED board for a needed center plate. So when I removed the glass that was used as a perfect outline on where to cut the LED board to fit the place of the glass.

I used my soldering iron to remove and save all of the LED modules because that stuff always comes in handy.
I figured the fastest way to remove all of the diodes was to heat the stripped LED board with my heat gun and that let all of the diodes slide right off the board. After the board was cleaned of components I cut it to size and put it in place and folded the tabs down so it stays in it's new home.
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Getting a driver in there that I wanted to use was going to make things a very tight fit. I decided on using a Meanwell ELG-100-C1400B 100 Watt driver. That should give me decent power at 1.4 amps. Not quite 100 but plenty.
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Getting a driver in there that I wanted to use was going to make things a very tight fit. I decided on using a Meanwell ELG-100-C1400B 100 Watt driver. That should give me decent power at 1.4 amps. Not quite 100 but plenty. As you can see to get the driver to fit in there and give enough room for the heat sink and cob to be centered I had to trim the tabs off the driver to get just a hair more room.

Drilled mounting holes and used Stainless hardware to secure the driver.
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After that I centered the heatsink and cob and marked drill holes to be sure everything would be pretty neat.
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Time to clean up rough edges

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Now to put everything with the heatsink, fan and chip in its place I mark and drill the holes and then mount the chip using Arctic Silver 5 thermal paste.
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Now to wire up the chip, fan to the little fan driver, and power plug and dimmer wires I always solder and heat shrink everything so it's safe and tidy.

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Before I seal it up I wanted to test my dimming 100k potentiometer.
It ended up being a very sloppy spec pot only reaching 92.4k ohms but that's ok. I may swap it later.
The low was 2.5 ohms the high was 92.4k ohms.
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Now, all this is great and all but it's not worth anything unless it works.


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I gotta say guys and gals. Compared to my huge 42 cob array this took what felt like 5 minutes:thumb:

What do you guys think?:goodjob:?
 
TWINTURBODOGO said:
Bad azz man! That thing is Brite as heck!

Sent from my SM-G530T using 420 Magazine Mobile App
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Man, its far brighter then my phone shows. Way more light then stock.

Ill do some par tests with it and post results.

Sent from my VS980 4G using 420 Magazine Mobile App
 
Man. You never cease to amaze-ballz me. I am amaze-balled!
You truly are a dude's, dude...dude.

Great job.

I'm betting 950 micromoles at 12". Bet placed.


Sent from my iPhone using 420 Magazine Mobile App
 
We aren't done with cob projects yet people. I'm going to be doing some fairly extensive COB testing coming up very soon. I bought 7 of the more popular chips that people swear by. We will be mounting each one on a heatsink and individually testing each one at 25w, 30w, 35w, 40w, 50w, 60w and 80W with an Apogee MQ-500 quantum meter on a grid. We will be testing ppfd/par and COB efficiency.

In the lineup:
Cree CXB3590 CD bin 4000k
Citizen 1825 in 4000k
Citizen 1818 generation 6 in 4000k
Citizen 1212 in 4000k
Vero 29 7th gen 4000k 50v
Vero 29 7th gen 4000k 37.7v
Luminous CXM22 in 3000k
 
fanleaf said:
We aren't done with cob projects yet people. I'm going to be doing some fairly extensive COB testing coming up very soon. I bought 7 of the more popular chips that people swear by. We will be mounting each one on a heatsink and individually testing each one at 25w, 30w, 35w, 40w, 50w, 60w and 80W with an Apogee MQ-500 quantum meter on a grid. We will be testing ppfd/par and COB efficiency.

In the lineup:
Cree CXB3590 CD bin 4000k
Citizen 1825 in 4000k
Citizen 1818 generation 6 in 4000k
Citizen 1212 in 4000k
Vero 29 7th gen 4000k 50v
Vero 29 7th gen 4000k 37.7v
Luminous CXM22 in 3000k
Click to expand...
Wow man that's gonna be some cool shite!
I think I'll wait till you test them all before buying any of the 22's or 1818's.
I posted another question for you in my thread about retro fitting my cheap cob fixture with better COB'S.

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