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So it is that simple when calculating the watts going from electricity to heat? Just multiply the total watt usage by the .%efficiency of the COB? If I go with a 52% COB wattage, then 48% is heat I have to account for, correct? Then it is a little easier to get close to the cm2 for passive...

Awesome, cant wait for my stuff to get here! :=) Still got a lot of loose ends to figure out, but the equipment should be on its way. What driver did you get to power your four fans?

at least you dont have to deal with humidity, which is a bitch. So I think youre just fine!

Hey man! Im planning to make a pretty similar light, if not the same. At least COB- and driverwise. Can you post me some bud shots of what they end up looking like? Nice light ! :)

I think there are many upsides to a setup like that. Also legally, I think you pretty much wash your hands, since youre not spitting out a physical product. But who knows about US laws. Im in South America, so shipping is a huge deal to me when buying from different people, and I think...

I wish you the best of luck. Im not gonna add any expertice to this thread, because I am not able to do so. If I were to put something competitive in the LED game, then it would probably be like this, since the DIY aspect is getting easier and easier: 1: As a seller/distributor, I'd buy in...

Im so glad that Ive been busting so many balls before ordering! It looks like Im ready to go for it. Unfortunately Jerry hasnt answered any of my mails for two days, I think he got tired of all my questioning despite my polite inquiries. hehe. Thank you guys. Id rather do 8 of these 3070 at a...

Thanks for helping out, Greengenes. But is it then because we are comparing a low bin CXB3590 with the highest bins of the CXB3070? As far as I can see, looking at it the way you propose, since Im going to build a lamp at either 0,7Amps or 1,4Amps depending on the voltage being 36v or 72v...

I can understand why youd be annoyed, but I really am trying to get this. Thats why Im asking, since Id rather be stupid for a few minutes, than remain quiet and stay stupid forever. I can see the lumens are higher at different currents on the CXB3590, but on the other hand, the lm/w at 50C...

W What the molly, the CXB3070 is better than the more expensive CXB3590? At least at lower currents, is that correct, can I rely entirely on these calculations?

140cmH,60cmD,90cmW, almost five feet high, 2deep,3wide. Ill keep thinking then... I thought 6 would be just fine for my space and then with a little more power :)

Perfect, then I will probably go for the 185 just to be on the safe side. I also think they seem quite similar, but perhaps it would be nice to keep some voltage space left for an extra cob or whatnot in the future. Thank you very much, Rahz. That goes for you, too, PurpleBuz. So, it is...

We are doing the "popular" 220v here,hehe. I dont know where that puts me regarding the drivers, but if the 185 is the best solution for turning on 3 at ~50w, then thats what Ill be getting. Thanks guys! Can I take from that, that you think this is a good solution? I mean, the combo $/w is good?

But isnt that a bad match for my COBs? Shouldnt that be able to power 4 72v CXB3590 instead of only 3?

Hey guys, Im enthusiastically reading thread after thread, and there is so much information and help to get, which is cool! Still, since Im only going to be building one setup, at least thats the plan, I would like to make sure, that I am making the most of it moneywise. So far I am...

How many watts do you place on each heat sink and how much did that size cost you O.O ?

I just thought it would be nice to be dealing with lower Amps in my setup :)

how much did that add up to?

Where do you find nice CXB3590 72v bins? I cant seem to find them!

How do I calculate the efficiency? I want to know whether my 2 bars are a good and efficient solution :=)