100,000lm LED array

[VoidsWarranties]

I’m making an array of 100w leds, 10000lm each(supposedly).  They run at 34-36v.  They are going to be liquid cooled so the array itself could be reasonably light and portable.  I have 3 750w 12v power supplies that I can put in series to run them.  I’m asking for any advice or problems that you can see with this design.


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[ajb]

You haven't really provided a design, more of a concept.  In theory what you've described will work, but the devil is in the details.  The specific power supplies you have in mind, how well matched your LEDs are to one another (cheapo high power LEDs tend to have substantial parasitic parallel resistance which affects their V/I curve beyond the normal diode parameters), how exactly you distribute the 60A from your power supplies to the LEDs, and a number of other factors will all affect how WELL it will work.

10klm sounds rather hopeful for 100W LEDs, the cheap ones I see on Amazon all claim 8-9k.  With cheap electronics, usually the claimed performance is inversely proportional to the quality, so beware.

 Generally you want to run LEDs in constant current mode, but the high power chip arrays often get away with CV due to parasitic series resistance and the fact that voltage changes are split across large series strings.  Hopefully you'll at least be able to trim your PSU output voltage a bit to get your current in the right ballpark.

[texaspyro]

I have designed several very high power (50,000 - 500,000 lumen) sources.  I can't go into any detail, but:

Forget those Ebay arrays.  They are all pretty much falsely spec'd, unreliable, inefficient turds.  I used arrays from Bridgelux.  They were rather overdriven, but still very reliable.

Forget using CV supplies... disaster awaits.  I used a separate programmable / dimable / addressable CC supply for each array.  Main power input to the drivers was 48V.

Liquid cooled.  Over 5000 watts to get rid of.  Waste heat was put to good use.