This LED is completely bonkers, and the setup that he had to do to even RUN the danged thing!
Not exactly Budget Friendly, but still cool to see what’s out there 
Pretty horrible setup TBH, those cheap power supplies and LED drivers aren’t designed to run in series or parallel.
To run an LED like this you need to get a specific constant current power supply that can do 1.5kW+ or smaller ones that have parallel capabilities.
Then there is an extra connection you need to run between the power supplies, you don’t just wire the + and - together and call it parallel.
These power supplies are sold by brands like meanwell,and would typically cost $500-a few thousand dollars.
He did set up a constant current supply.
From the Mains to a DC Power Supply to a series of six Voltage Step Up converters (36V 7A if I remember correctly), the last with constant current manually configured so he doesn’t get thermal runaway.
The Mains supply he fried toward the end of the video though.
Is that another Yuji led? Well, it is.
I really see nothing wrong with the way he powered it up. One power supply for each 3x group of boost modules, each module feeding one of the chip's 6 sections (just a guess, I can understand some of what he says but not really much). Given the 48 A rated current, that means ≈8 A of current in each one and just above 30 V of average drop. Listed input voltage is 30 - 41 V, weird in my honest opinion. Maybe it can be run at 3 or 4 kW just fine… O:)
What's the point for this led I wonder, though.
Thu, 04/16/2020 - 04:44
First of all, those cheap AC DC converters from china suck, and they definitely are not meant to go in series like he did.
Second, those converters are also cheap crap from china, which have no parallel wiring capability.
Surprised they didn’t burn up.
The load was clearly unbalanced, probably why the LED was nowhere near as bright as it could be.
Yeap, it is Yuji.
It seems people love the idea of thousands of watts in one LED, even if this one is a COB so not really a single LED.
In reality having more LEDs spread over a much larger surface helps with dissipating such massive wattage as 1500W, rather than have a “bottleneck” of 90mm diameter.
Datasheets say 41V max and 60A max, so that is 2460W in 90mm diameter. 
It's basically a bright cooking plate.
I think he actually killed the PSU near the end of the video though.
Of what I can see and understand (have the closed captions on), the 2 power supplies of 12 volts output are connected in series. That’s the no-no at these currents*. The drivers are boosting the voltage between 30 to 40 volts each with current limiting to 250 watts per each of the 6 sections of the LED array (individual parallel sections - no balancing required).
- When I originally saw this on my YouTube feed, had an apprehension of the series connexion of the DC outs. If the system is 1500 watts and the led array is at 35 volts (@9:00) then some 42 amps are drawn. But I let the fellow continue his demonstration as he’s proven himself to be quite resourceful and pragmatic in his projects. And yes, the Pwr supplies fried.
@Barkuti;
If you build it, they (uses) will come.
I would not be surprised if the outputs on those power supplies are not properly isolated. Series connection let the magic smoke out.
Yeap he did.
His greatest mistake was pulling the main switch without letting the supply cool down, essentially cooked itself.
I would love to see someone with deep enough pockets test this monster and see what it really outputs beyond what the datasheet says of 120K Lumens and what have you hehe
Why does a dog lick his wang? Because he can…
Something like this might make a nice high-cri area-light for photography/movies, or studio lighting, who knows…
That’s a crazy cob. The best application for high intensity lighting is high speed video and photography. Plus the high cri is perfect for that. High speed filming at really high frame rates needs lots of light to expose properly. The auto industry uses high intensity lighting in crash tests. That or something like a searchlight, but sort arc xenon lamps usually work better for that (easier to power too).
Wow, a $1350 LED…
Server power supplies would be good for this application with a boost or buck converter capable of handling the current. They can be bought used for pretty cheap (around $20 to $40) and can do upwards of 1500-2000 watts or more for big ones. You could connect them in series or parallel as well I believe. They do it in data centers for redundancy in case one fails the other takes over. You’d need to change some of the woring possibly to get it compatible, but I think it’s doable.
Not sure exactly what boost converters he was using but I feel like he would have been better off running the power supply either separately since the led does not appear to care or in parallel if the boost converter can handle 12 to 40 volts. I run a set (3) of the even cheaper led power supply’s in parallel with a super cap for a car audio system in a home setting and never had an issue but at no point would I have thought to try running them in series.
So……… who’s the first that’s going to put one in a S2+?
I could source a much cheaper equivalent of this emitter. Though my pocket is not deep enough for the power supply and cooling system required to run it.
Only if someone can actually build a rig to test that thing.
Hmmm I’m pretty sure an EK annihilator pro waterblock would fit on that……
That just barely won’t do, the Annihilator pro is only 70mm wide, slightly narrower than the emitting surface (72mm diameter), and of course, smaller than the entire plate (which is 88mm in diameter).
Edit: The 70mm part is the size the water block only. The entire cold plage is about 86mm. So this might work well enough.