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I thought like this at the start, but then soon learnt that the future-flexibility-range that your trying to create cant be very big(almost not worth the small gain), because once u raise your future-higher amps, the volt range that the driver gives lowers and you will quickly find yourself now...

@Boatguy No, after I edited my post I asked an additional question re the 240-36B driver, which was that the datasheet for the 240-36b header read "Constant current + Constant voltage", so did that mean that that driver can be used for either setup, which was why I linked to that driver. I...

@mahiluana Thats a nice build! I think I need a fresh mind to read your post, too much stats reading today has fried my brain... thanks!

@Boatguy yea, I thought maybe that its not the minimum-max rating

@Boatguy Thanks, My build should end up around 250w each driver

Hmm, il have to search for some builds using these BJB's to see if anybody is going over the limit rating...

But doesn't the voltage stack to 180V?

@nogod_ I quoted wrong driver, corrected it now. So I guess you would advise not to go against the ratings... hmmm Edit : However regarding those HLG-240-36B drivers, the spec states they are Constant Voltage + Constand Current, does that not mean we can choose how to wire them? HLG-240-36B...

BJB Data sheet : https://www.bjb.com/index.php?pid=397936&lid=4 The BJB 47.319.2033.50 is compatible with the CLU048 Series along with some others. However im planning to run in series 5 cobs per HLG-240-C1400 driver at 36v 1350mA, = 6.75A. Should this be avoided? I am assuming that a...

@VegasWinner Thats along the lines I was thinking. Cheers!

Yes gbauto thats would be underlying issue. However im just after a general answer from the average COB LED setup these days - Would a 600w @ 50w per cob grow room run as hot as running a 600w bulb, I assume it wont but maybe im wrong. I will have my own setup soon, so I will find out one way...

So then it becomes an issue of how much heat is created from light, and how much from loss wattage. As LED useually outputs more light, I assume it will be less heat. Putting the science aside. If anybody has/is running e.g 600w in LEDS, is your room a lower temp than it would be with a HPS or...

From my understanding, I thought that if 1200W was used at say 65% correctly(light) (35% loss translating to heat) then technically the unwanted waste heat comes from 35% of the 1200Watts? Also if cobs give you more useable light for the same 1200W, that kind of implies that it cant produce...

I am wondering if anybody can comment on this from experience within your own grow rooms. Roughly what percentage of heat in comparision to HPS would these LEDS give out when driven at 50w per cob? I am assuming from reading that they run less hot, but would hoping for half the heat as a HPS...

I see in most builds people use Ideal holders, however if enough care is taken (dont screw in too tight), could we use those 2 holes to screw into the heatsink? If not, what are the holes for? Also, does BJB do a holder for the 6th Gen 1212's? The reflector-type-lip design looks more efficient...

I think the 240-1400 will be fine for 5x 1212 either 5th gen/6th gen, I heard meanwell is very conservative with there driver spec - could be wrong tho.

Nobody used this before????

I can see now you said it your driver only has adjustable current. However the ELG-240-36A I was thinking to get allows for both adjstable current and Volt with the A model, or the B model if applying own pot http://www.meanwell.com/webapp/product/search.aspx?prod=ELG-240&mws=F53F34B19F590BD1...

@caretak3r http://www.mouser.com/ds/2/260/ELG-150-C-spec-806118.pdf The spec sheet does state the range of 1400a is 54-107v, do they normally go above the given ranges?

This is good advice cookie master. It will also save you 50%+ on COBS.