It's posted stuff I was just trying to preview a couple times. When I tried to finish the previous post, it got eaten. :wtf:

Anyway, I'm back at it. Got new leds epoxied to the sink. Wired up and measured a couple reds, both of 'em almost "in the crack" between 2 voltages. About 10.6 and almost 10.9 for the other. Maybe not a problem, I may run 3 leds each on separate power supplies. That kinda depends, and I had calculated a question:

1.2A x 10.8V = 13W.
13W x 4 leds = 56 W.

NOW I read somewhere Mean Well likes 30% extra headroom (130W. of driver to push 100W.of leds) So 4 reds on that PLN 60-12 is close to full 5A load, any way you figure it. Trying to run 6 reds per light means a big-ass driver ($) or 2 x 3. My original plan was to run 4 reds per driver, with one driver split lighting the 2 "extra" leds on both lights.

How much headroom do they really need, is I guess what I'm asking.

These Mean Wells are very nicely made, BTW. :thumbsup: The trim pots that adjust voltage and current feel smooth, like a nice full size pot, and the taper is great, real smooth changes; easy to dial in.

The 12V adjusts from 10.61V to 13.27V (exactly, every time, measured with a Fluke 87) and the 15V goes from 13.21V to 16.55V.

Gonna try and post this now so I don't lose it.