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Ah OK, I thought you only had 10 up there. That makes alot more sense then. My problem with using 15 is covering up this new room I'm working on. 50% more cobs starts to get a bit much when we get to larger rooms like 20 or 30 kw. Still looking for the sweet spot at that size.

Hey six, aside from all the math and shit, what's your real world opinion on the how much current needs to be pumped through 2 bars of 5 to meet or exceed the yield of a 1000w DE? I'm seeing on these numbers on spreadsheets and calculators telling me I need 2.1A to make the same PPF as the...

Thanks @HydoDan. @welight, I'll be in touch. Whats the best way to reach you?

@Ben-Ben yeah I'm starting to see that it might be difficult to get the quantities I'm looking for. Sounds like we're in the same boat.

Hey gang, I'm looking for some additional options for sourcing COB sets in Canada. So far I've been speaking with KB Jer, a little worried about the shipping/lead times with him. I had an account with DigiKey a while back, I may try to re-activate it and see whats up there. I notice a few of...

Just adding a note here so I can find it later. Good stuff.

@CobKits, @Rahz, thanks a bunch guys. I thought by the numbers it had to be an older ship, but I'm not all that up to date on the alternatives to the CXB. I sure am now, cheers. Seems like 3000K is the way to go now for flower? Man things change quick. Love it though.

Interesting info about the Vero, I hadn't considered it. Continuing on with this build example, to hit 51000 PPF at 1.05 amps, this is data from the calculator: Cree CXB3590 3500K: QTY:550, Total PPF: 50313.0, Total power watts at the wall: 20795.74 VERO29.V2.0.4000K: QTY:700, Total PPF...

Totally. Super interesting to see the innovations happening now in this industry, and I think they'll benefit other industries as well. Can't wait to learn more about how I can recycle the heat as well, it would be super up here in the great white north!

Yeah, I still have some doubters in my camp even though I've demonstrated results on a smaller scale. That's why I want to crush the DEs by pushing a higher current, then perhaps scale back by dimming a bit once I've proven my point. Or not, and just crank it up even more, which just might...

@sixstring2112 Them be some fine looking ladies bro. I've followed alot of your posts, learned and laughed alot haha. I'm working on a similar room as you by the looks of it. I was thinking of 2 bars of 6 pushing them a bit harder for every swap, say around 2000ma. That would still give around...

I'm curious as to how you would come to that conclusion. Based on what I've seen on this thread, the economic side of the picture looks very attractive at a large scale. My concern would be efficacy at scale. With smaller rooms and fewer plants, canopy management is less of an issue, ie scrogs...

@Rahz, where did you get the 2.3umol/j figure for this calculation? I've been playing around with the DIYCOBLED Calculator and I can't seem to get the numbers to match yours.

I'd love to give this a shot - is there a problem with the link? Edit - sorry was looking in the wrong place duh

That's fantastic.

In an unducted scenario, I've been told it would require approximately 15-20 tonnes of A/C for 50 x 1000w DE. All things being equal, if only 25% of that is required for a COB setup, that's a very compelling contribution to the overall efficiency.

Given the above calculations, and all other variables being equal, what would the difference in cooling a space with 50x 1000w DE versus 493x CXB3590? Sorry for the hijack, but I though that should also be taken into account if we're looking at efficiency. $pectrum King claims you can "Cool up...

Got it going boys, thanks for the inspiration.

Thanks for pointing that out. Going to give it another shot now. Already got my relays working from my phone, once I get the dimming down I'll be cruising.

Tried both ways...