The issue with the H1R is too many power levels , with the top ones depleting the batts quickly. She ramps too high for other tasks and leaves it there, she's in the dark an hour or so into the blackout. She may even try and use 2 lumens for everything because she will be clicking the light on and off when I assume its hold down to advance modes. Also its a new battery size I'd have to get her to store, and USB charging as an option? No offence as you obviously like the light for yourself but its about as complex and uneccessary a light I can think of for her situation. As you say she's been driving for 50 years, but old country folk sometimes have no interest in new tech. I am aiming for 1-2 modes, low lumen max, if she chooses wrong, she has hours of lighting....and won't start lighting candles.
I also have a Bushnell pro rechargeable lantern. It will light a full room brightly if needed. I mostly use it on one side dimmed down. When we go on camping trips it will go four days of constant hours on end use before I hook it up to a solar panel to charge. It also stores a long time fully charged and ready to use. It would be a much better option than any flashlight or headlamp. I can also charge my phone with it because it has an outgoing USB. I will from time to time charge the S1R or H1R with it.