Fanleaf's Huge 42 COB Array Build Plus Other Builds

fanleaf said:
110 lumens per watt makes it less efficient then a double ended hps. Be great for a football stadium though
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Very true. And a 1500W DE doesn't weigh a ton or cost a fortune. But HID isn't cool and doesn't have copper tubed heatsinks. This LED is as cool as a shark with a laser on it's head.
 
On a serious note, Fanleaf, your build inspired me to go the extra mile. I picked up six of the Kill A Watt Easy meters and immediately pulled one apart. My plan is to install the internal components in an old under-monitor power switching box, the type that has individual power switches labeled for computer, monitor, printer, etc. Very old-school. Individual power switches, monitoring, and control of each of my four COB arrays plus peripherals. A friend is going to water-jet cut the panel for me. I have yet to determine if the Kill a Watt controls can be ganged to momentary push buttons so I can step all of them through the menu at the same time.
 
Looks like could be a pretty good light. Idk know to much about the cree, but the osram diodes grow really well. I have 2 panels that use osram, and I can pull a lb from each light at 400w. Fanleaf should be able to tell you everything need to know on the cree chips.

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The 3070 chips that they use are not as preferred as the 3590s, but they are not a bad chip by any means. It appears that those panels are decent, not sure what the conversion rate is, so price is unknown to me. Those panels are very similar to Amare's panels, you should give them a look and see how the price compares.
 
Fanleaf, mind if I tag along and learn something?

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tricam said:
Fanleaf, mind if I tag along and learn something?

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Welcome aboard!
 
Heres an updated test of the 4 CXB3590 array in the middle of me creating feminized seeds from 2 female auto's!

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COgrower said:
I'm growing in a same sized cabinet and I was thinking of going with 4 COBs too when I get the money. How many watts are you drawing at 50%? Active or passive cooling?
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I am using passive cooling but I have airflow over the heatsinks from small fans. The 50% is an approximation with the dimmer dial turned half way from full on to off position, I believe off is still 10%( I could be wrong about that)


SeymoreNugget said:
50 percent depends on how many Milliamps your driver pushs and your chip uses.

A Cree CXB3590 36V uses arround 50W@1400mA. Same chip with 72V uses 50W@700mA. Citi 1212 36V pulls 45W at 1050mA, Vero29.7 36V pulls arround 69W at 1750mA, a 69V chip would be way over 100W. So you get am idea that 50% says nothing in terms of actual wattage or lumens because it depends on chips and power supply used

I think if keltic went the standard route of 36V cree 3590 and a 1400mA driver he will use 4x25W at 50%

Current Grow Nebula & Atomical Haze - Soil - 2'x3' Flower - 420W DIY COB - SCROG 45W DIY Veg Light

My journey seeking the light. Found some
SeymoreNugget's DIY talk - Building lights - Sharing ideas
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I did indeed do the standard so ~ 4x25watt. I never knew any of this before I did the build. It is amazing how much I have learned from these threads.

I have the meanwell HLG-185H-C1400B driver.

The heatsinks are cool to the touch with a little fan blowing on them. without the fan they get warm But I could leave my hand on the heatsink so it is not hot by any means. Again I have been keepimg the dimmer in the "middle" position.

Here is one way I have had a fan blowing on the heat sink. Still experimenting. And I do plan on placing the driver outside the tent if I can remember before summer rolls around, got that idea here toooo. Big Thanks guys!
CIMG1507.jpg
 
Fanleaf:

I picked up some of the PZEM-021 inline meters and sometimes the chinese translated instructions just don't not click with me. :tokin:

To start off I am looking at the wiring schematic ????????? How should these be wired into the driver cob array?

Then what are the basic settings via the one button? or are they needed at all?

Thanks,
 
BrixNewb said:
I got my 12 COB CXB light in today (actually two of them, but for now only using one). I went into the tent, pulled the HID and got the thing all settled into place. I fire it up and VOILA! Only 8 COBs are on. I must have troubleshot the dang thing for an hour. Thought I had it narrowed down to the driver. Replaced the driver, same exact thing. So I did a little of this and a little of that, realized the only thing it could be was the dimmer. Disconnected the dimmer and she is rocking and rolling. Thought I would see a bit of temp drop versus my 600 watt HID, that's not the case. Actually think she is running a bit hotter with the COBs.
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I have a vague memory that you need to put a 10 ohm? resistor across that open circuit that the pot was on ... :hmmmm: ... it can't run entirely open.
 
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