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I think to understand this forum, it's necessary to know some basics of electricity... https://learn.sparkfun.com/tutorials/voltage-current-resistance-and-ohms-law There's value here for those of us who aren't that familiar.

So the typical vf of 36 is used rather than the max of 39? And the amps would be whatever the driver is supplying?

That's exactly what @Greengenes707 said. Alright guys... It's sinking in lol! I'll just have to find a design I can visualize and create. Thanks @Danielson999 and @Rahz. One question... How does the driver wattage figure into this? I get the amps but not how it correlates with watts of the...

wow.. So aren't I looking for 7K to 8K lumens per sq ft? Thank you for posting that. I've looked at those and haven't quite understood them till now.

Yeah I saw it will hold 6.9, 3070's, I think, but would that replace a 400w HID system? It seems like of be better off with too much than not enough then use dimming to refine it.

Hey buddy...Thanks for the advice. I really want to build a 6 cob light, 2 bars of 3 cob's each. There doesn't seem to be a configuration though, without using two drivers that is, that will beat the suggestion you make. Indeed, @Greengenes707 said that this would be a badass combo, and I...

This is from a guy named Dion at icmag. I have no experience with these or any driver but to your point, here a link to cheap drivers... http://www.aliexpress.com/item/Waterproof-LED-driver-60W-50W-1-5A-6-12X5-QiHan-constant-current-power-supply-lighting-transformer/32265565611.html

This should help you.. https://docs.google.com/spreadsheets/d/1nKfc12OCuDu7puJCa_6maefyCVm3gS5sBmzAXOlh06w/htmlview I was referred to the hlg-240h-c1400b to run 5 cob's. I'm just learning too but I've got to say that looking at the videos and spread sheets is really the way to go. Learn it...

It looked to me as if cutter had plenty of drivers available that aren't mean well but do have a 5 year warranty. Anyone try those??

So what would you recommend for a 6 cob and drivers build that would out perform 5 3070's on a 240-2100? Based on either 3070's or 3590's.

I've got a pretty high powered hand drill so thought I'd just use that but I've got a furniture project I've got to build a peice for so I thought the easiest way to go would be the press. Cutter looks like they've got drivers on their site so I might just go with them for cob's and drivers as...

According to this it can... https://docs.google.com/spreadsheets/d/1nKfc12OCuDu7puJCa_6maefyCVm3gS5sBmzAXOlh06w/htmlview

Cool! Is the wattage you're quoting the draw from the wall or is it output? I'm glad the drill press is working out. I was at HF in r'ville and almost pulled the trigger on the press. I remember reading how a guy bought one and said it sucked so I held off. Glad it's working for you. If I may...

The "low buck China driver" I've heard good things about. Dion at icmag.com has a link to some very good ones in his thread. I believe a few people use them here as well. https://www.icmag.com/ic/showthread.php?t=304279

Yes it would but I don't think, and I could be wrong, it would be as efficient as a 5 cob, 240-2100 build if my numbers are right. I don't want to spend more money (6 cob's) and get less light, efficiency and everything that comes with it than I could on a 5 cob light. Now that's providing I'm...

My primary concern is output and efficiency. Also knowing what I'm talking about would be a bonus lol ;-)

What size heat sink is that built on?

The efficiency of 6 cobs on a 240-1050 when a 5 cob on a 240-1400 setup is better makes the 6 cob setup kind of obsolete. I think I've come to the fact that if i'm going to run 6 cob's like I would like to run them, with the design I'd like to build, I'm going to have to use 2 drivers. I don't...

Cool! Nice design

I've worked it "backwards" as you say and the best setup is a design like @bizfactory but 5 cobs on two bars, which is a great option spec wise, seems uneven spread wise. My other option is to have two drivers running 3 each which does work but it's not the most cost effective option. It's...