I'm in complete agreement that he'll have his iPhone flashlight with him, so this is looking for something MORE.
William and others ~ are the HD versions close enough that it makes no sense to buy the bigger named brands?
One that really strikes me is the
Foursevens Mini MKII. This gets rave reviews in a number of places and seems to tick a lot of boxes.
And as for use, I'm definitely imagining this as an emergency-accessory, but cool flashlights seem pretty neat to me, so I'd hope it's not just a glove-compartment-and-forget-it tool. If that's the ultimate fate, then I'd definitely do the HD option.