CXB 3590 3500K build questions

[GroDank101]

@CallmeTex did you think about using 12 cobs instead of 8? like this
x---x---x---x
x---x---x---x
x---x---x---x

or would that just be way too much light?

 

[CallmeTex]

@CallmeTex did you think about using 12 cobs instead of 8? like this
x---x---x---x
x---x---x---x
x---x---x---x

or would that just be way too much light?

Yea man, I'm not trying to cover a 4x4 with this light. I need to cover 4'x15' of canopy, I'm just slowly transitioning. I think 12 would be perfect for a 4x4 though. Could probably cover a 4x4 with 8 if you drive them harder.

 

[Airwalker16]

Yea man, I'm not trying to cover a 4x4 with this light. I need to cover 4'x15' of canopy, I'm just slowly transitioning. I think 12 would be perfect for a 4x4 though. Could probably cover a 4x4 with 8 if you drive them harder.

I cover a 4x4 with 8 @ 1750mA

 

[GroDank101]

I cover a 4x4 with 8 @ 1750mA

I think I might use that setup too, just because 12 cobs at 1400mA would be a bit expensive to throw in a 4x4.

 

[CallmeTex]

Okay Y'all, I did the build yesterday and it took about 6 + hours start to finish. Total cost for this beast was around 820$.

 

[jeepster1993]

I like it.
8 cobs, 1 driver...What wattage are you running each cob at?

 

[CallmeTex]

Dimensions are 36''x28'', I used 1/8'' thick 3/4'' angled aluminum. Cut the frame with a miter-saw with metal cutting blade, drilled the holes to mount the heat sinks with a 3/16'' bit to account for any error and make putting together fairly easy. I tried with a 9/64'' but was off on a couple so just went the next step up. I attached the heat sinks to the 36'' pieces to ensure everything would line up right. Drilled the holes of the rivets one at a time with the 9/64'' bit, then snapped the 1/8'' rivets just like that. Drill rivet, drill, rivet.

Once the frame was together, I detached the heat sinks and spray painted the frame black for looks. Let it dry which took about 5 minutes because its so damn hot, added another coat and let that dry. I wired it all up in series with 18 awg 600v max solid wire, soldered all my connections to the driver, and taped everything up separately, nice and neat. Double checked all my connections, then took a minute to think of everything that could go wrong, before I forced myself to plug it into the outlet. Ahhhh, it works.

 

[CallmeTex]

I like it.
8 cobs, 1 driver...What wattage are you running each cob at?

Its a 400w driver 1.4amps. 50 watts each, give or take.

 

[jeepster1993]

I got this going on... Not sure if I screwed up or not.
Bought all this for my second diy light.
This is 4 3590's and mounts, reflectors, etc.
Plus those 140 mm heatsinks. They are huge, I had no idea, should have checked, I suppose.

Can I use them? They are not too big are they? I can always make the frame to this size.

 

[CallmeTex]

It seems like too big will not be a problem @jeepster, I'd roll with it..