So what would this look like in a big reflector?

Flashlight Modding and DIY Parts
1

https://illuminationsupply.com/xte-white-4up-r5-6500k-24mm-board-p-182.html

That's it: What kind of beam profile should one expect in a reflector that is, let's say, about 55 to 60mm?

Also, how is this wired to the driver and does it require a specific kind of driver?

2

I would expect a doughnut hole and no central hot spot, unless the reflector dish surface was textured enough to flood it out.... like an MCE/P7 in a semi-smooth reflector.

3

Well, that doesn't sound too ideal for a flashlight unless you're really going for flood. I'm curious how much output it would produce with a good IMR 26650. Probably not enough to see any significant gains over a single XM-L. But I wonder about the efficiency in this particular comparison.