I think at least one LED headlamp would be a very beneficial addition. Being able to go hands-free is so useful when you have things to do in the dark.

Actually, you might want to ask her to check out any LED lights before she needs them. I know that some older folks have a hard time seeing with the bluish light from LED flashlights compared to the old incandescent flashlights, even if that light is dimmer and orange. Even in younger eyes, blue wavelengths are not focused well by the eye, and that gets worse with age. Maybe that's fine to put up with in an emergency, but it annoys the heck out of some people.

Good luck getting your mom prepared.