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Turned on 10x cobs @ 0.8 amps in a 1.80 x 1.70m x 1.80m room (test mode). No intake, no exhaust. In one hour temperature built up from 19 to 24 celsius. Will leave for a night and see what happens :D I use 180mm (1 heatsink for 1 cob) passive coolers. The largest I could get on kingbrite...

Yes, and 74.4 x 2 = 148.8V and that c3500 version can supply max 137V and "weaker" option could run both but not close to 3500ma.

If you do not care about electric bills, use less cobs and run them on higher amps. Get bridgelux simulator tool, look at voltage and amps. If driver has, for example, range 50v - 100v, then you can run everything within this range, for example, 3 x 30V leds, 2x 26V, 1x 90V etc. I do not know...

You can see in that table - the lower the current, the higher is efficacy. My thoughts are - buy as much cobs as you can afford and run them on lower amps.

Hello. If I read my plant and see that, for example, magnesium is needed, I find a magnesium sulphate at shop. Is that what it needs? If so, why dont we write use "suphate" or "nitrate" etc. when we speak in terms of nutrients..?

Hello. If I grow soil, could I use the nutrient meter that shows just "bad, normal, good" mode?

Oh, shit. Sorry. I was drunk yesterday so im slopy today. I meant 5ft x ~2.7ft :D

Hello. 5x5ft x 27 - 2.9ft is the size, could I cover it well with 10 cxb 3590 @ 700 ma?

Is it possible to grow mother plant in a small are? like 1 feet x 1.3 feet x 4.5 feet (height)?

By supply You meant by cloning, right?

Hello. Is there any advantage of buying regular seeds than feminised, if we don`t think of the their cost?

Where are your lights? My max height is 180 cm :D I should probably hang it in 4 chains. Will weld a frame and then add reinforcing rod sieve as my net. And paint it white ^^

Hello. I am going to run COBs (cree cxb 3590) @ 700ma to 1000ma, what could be the minimum distance between scrog and my lights? I am willing to make it easier and make a non adjustable scrog, but if it is necessary, I will try to make it adjustable.

Is rockwool from home depo suitable for growing? Rockwool for insulation? They come in large sizes.

Yes, yes, just curious.

Ups, double post, some error appeared.

It is also possible to run 3 COBs on this driver, right?

So, I just ordered 10x cxb 3590 A 36v. Now I am currious. Can I power them with HLG-240H-C1400B ( 5 of them on one driver) and be able to dimm them with external potentiometer? I think I can, just trying to be sure about it.

Hello. Can a mother plant be grown in a ~ 40x30x150 CM small box? COB style @ 25-40w Thats ~ 1.1 x 1.3 x 4.9 feet box. Another thing. Is there any alternative for cloning, rooting gel? I cant find it where I live.

Is that possible that CXB 3590 3500K 80 CRI DB is not possible to found on mouser or arrow, but alibaba sells them?