We have quite a lot of wildlife around us; deer, moose, coyotes, hedgehogs, pheasants, nearly non-stop turkeys. It really hasn't been an issue.

It's not as if you cannot see with normal, old-fashioned headlights. That's what I'm confused about; the problem with headlights at night is that they have a distance. So rather than being unable to see, what you actually get is less reaction time. ie, rather than seeing 'til the next hill or turn, you can really only see to the end of your headlight beam. Ultrabright headlights actually make this worse; you have no night vision whatsoever due to their brightness, and and anything outside of the beam is completely invisible. This isn't as much of a problem with old fashioned headlights as they don't trash your night vision quite as badly. In any case, the problem is that you have less time to react due to only being able to see within the beam of the light -- and brightness really does not affect this.

This is totally aside from that fact that the moose threat is NOT that they're in the road 1000 feet ahead of you and it's too dark to see -- it's that they come right out of the woods before you have time to react -- and brightness, again, does not actually affect this.

Moose aren't invisible to a normal headlight.

I agree with all of this. For wildlife, using long distance IR or something to augment makes more sense than higher brightness normal lights , given how falloff works.