Is it possible to make a tri-XM-L EDC? If not, why not? This is probably obvious, but I don't know enough to know why. I assume it would draw too much current or something.
You could drive it at any current you like - I think the biggest issue is space. You could cram 3 XM-L's in there, but there's be no optic that would work.
I didn't even think about that. That makes sense. If an optic were available, or could be made, would 3 XM-Ls eat through batteries more quickly than 3 XP-Gs (on the brightest setting)? What would be the difference in OTF lumens? Would it be significant?