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The OP mentioned it casually. I didn't see any threads but I can see this being doable if the heatsink is not that wide, like say 10-20cm or so. It should be easy to fix the COB holders, say, for the CXB3590, on the sink, attaching them to the holes on the holder (on each side of the...

I am a little baffled that I myself never came up with the idea to fix COBs with zip-ties. I mean I am using zip-ties all the time for other stuff. I realize it's "ghetto", but it might work if someone isn't too confident tapping. (The fact that I don't have experience with tapping is the ONLY...

You should ALWAYS have metal parts such as cases, heatsinks etc. connected to ground/earth and use an appropriate plug. Don't know what you mean with "fully covered". Make sure there is a solid connector on your heatsink or case for the ground wire. You can also use a Multimeter to test whether...

I am in the same boat, getting a light with 4x CXB 3590 now which means I'll have two MarsHydro 300W lights over. I am not planning to run them in addition with the COBs - but I might extend my growing area in the future and might want additional CREE COBs, so making a "Ghetto COB" out of the...

Yeah probably on a sea turtle :) Ah..Turtle probably faster than their ships :)

Extremely pleased with Jerry/KB..otherwise I would not necessarily want to order from alibaba...but Jerry is the real deal. He shipped my order out two hours after I ordered and it made its way from China to Spain in less than 48hrs. It arrived on a Thursday and sat then at TNT center (like...

I really didn't want to do that, not wanting to spend $40-$50 on a heatsink and then (literally) screw it up. This is why I let the light build by someone. However, may well be that drill/tap in aluminum is child's play. I just never did it and didn't want to risk anything.

>> How can I run 8 CXB3590S on one 700ma driver? And how is the wattage only 23w? >> You can run the COBs at whatever wattage you want, I personally would not want to run CXB3590 at only 23W. (Mind you their max is 137W, correct me if I am wrong). But of course if you want to run them very cool...

It's actually "relatively" simple with the drivers. Look up the specs of the COBs, say, the CXB3070 or CXB3590. The CXB3070 in general are run under-driven at 50W. So if you have a fixture with 4 lights you want to run a 50W, you need a 200W driver. (In this case for 50W per COB you run them...

Someone cranky today? I am not arguing this, if you read my post (and everyone else who knows a bit about LEDs will agree) I say that CREE COBs are more efficient and ultimately "better", I mean just looking at the specs shows you that. There is a reason I am switching from MH to CREE CXB3590...

I am no taking EITHER side here, but Realstyles, I am sure you know why they're "brighter". They're brighter because a) the CREE (Or Vario, whatever) COB chips are more efficient and yield more lm/W and b) they're brighter because the COBs are white and contain the entire spectrum, including...

TBH, the +/- €20 for the driver don't play a role , say in my case where I build (or let build) a light that will be around €420. The €20 are peanuts, it costs me €13 alone just to mail parts to my guys, so what? My criteria here is simply the 240W, when I have 4x cobs I cannot even run them at...

Nope I went with Mouser. TBH, unless it's Jerry/KB I am not necessarily trusting most of the Alibaba vendors. I could be wrong tho.

Mouser just recently had 4x HLG-240H-C1750A in stock, one I bought...now they're out. But 709-HLG240H-C1750B are on order, they're expecting 5 in the coming days (according to their site 1/4) and 18 on March 22 (!). So if you need them keep checking Mouser for those 5 coming in. And as far as I...

Don't blame the consumers please. The Chinese vendors sure do their part to deceive customers with "pretty numbers". Unless someone is a nerd like some of us, researching LEDs etc. they can make a smart decision. The average person is not that involved. If you read descriptions on ali or ebay...

Pretty much ALL of the standard (so called) "5W" LEDs are driven at 750mA/3V, you can even look up the specs for your typical Epistar/Epiled grow light LEDs. And 750mAx3V, well, is 2.25W. Now calculate 60 LEDx = 135W, which is exactly the actual power draw of those "300W" lights. TBH I don't...

This is really crazy: I JUST ordered the LEDs on Monday. Two hours later Jerry told me they're shipped and gave me tracking number. 24 hrs after pickup THEY'RE ALREADY IN EUROPE (from China!) and now they're already in Valencia, which is like 30mins from where I live. TNT told me expected...

Yeah of course "if you ask them" they can (allegedly) make them with some actual, real CREE COBs...needless to say it would sure increase the price massively. And many of those companies are so shady I wouldn't even trust them if they say they put in "authentic" CREEs. If the company would be...

Cool! Keeping fingers crossed then :) Thanks!

What carrier did he use, DHL, TNT, FedEx? Anyone got shipment from TNT (like he did with mine) and didn't have to pay any customs?