21 Amps !??!
10 + 2 !?!!!!

Hold yer horses, there, Nikita--I didn't think things were gonna escalate this quickly! And put yer shoe back on! I have everything I need to stay in this race: Thermal epoxy, room on the heatsink, and my (ouch) credit card! Just no time to "play" for 3-4 more weeks.

Supposed to be retired, but some projects came up that were too good to pass up. Gotta make hay while the iron hot, ya?

To respond to some things that went whizzing by during the last few days:
Some buckets, some ice, a sunset.
There are many ways to be busy.
Sounds grand. Folks complain about the drudgery of ice and buckets, but I love to cook, and that's how makin' bubbles seems to me. Like doing a big vat of demi-glace. You need to be "not-in-a-hurry" and appreciate the journey. I so look forward to relaxing a bit, and doing something nice with some leisurely prep. Coc au Vin, maybe Oxtail Stew. :thumbsup:

Actually, they are just that. HeatSINKS. rather than heat pumps or pipes, etc.
It is effective in adding "beef" to a PN junction that would go poof without it. but, is inefficient in dumping that heat elsewhere.
Well, I am a noob at heatsinks. These finned sinks I got just about made me wet myself, though, and that's dangerous around electricity. One led on a corner of the sink heats it up evenly, all the way to the opposite corner. It never seems warmer near the leds--the heat just flows away evenly, and a fan placed anywhere on the fins (even on a corner) evenly cools the whole sink. If I aimed a circulation fan so it just "grazed" the light that'd probably be sufficient cooling. (At least, for a puny 6 + 2 )

It's just that this term "sink" seems misleading to me. A true heatsink would just get hotter and hotter until...well, it just seems like they are all heat radiators of widely varying form and efficiency. Sealing the "sinks" inside the Meanwells just seems wrong, unless the case (polymer?) is designed to help transfer heat from the sinks to the ambient air. Actually, that was a question: would the meanwells be happier with the case open? (Let me know if you ever get one of 'em so you can help me use it right!)

Do you think I should start a new DIY thread or just continue to thrash about in yours?
Weezard, please do what you think will best serve the greater good. It's an honor to have you here. This thread has lotsa views, and I think your name in the title is why. (If I'd have called it "I am a dumb-ass and am trying to homebrew an led light" I doubt there'd be much interest. :wtf

I was (am) planning to do a separate thread for my build log. No sense dragging innocents through my carnage unneccessarily. Was thinking of a title like: "Build a hi-power led growlight--difficulty level age 12 and up." (Plug-and-play drivers, fo' sho')

So, whatever. Multiple threads about led builds may pique some interest, if that matters for anything. And Weezard is box-office gold. The Brad Pitt of CannCom, sorta:

"Weezard, please be in my thread!"
"We're sorry, Weezard's agent has him booked in multiple techy threads plus a guest appearance at a Star Trek convention. Check back next year for availability."

Whoops, gotta run. To be continued..... Hermie