Hmm, I had forgotten that the SL4AA has a pretty snug head.
I was just looking at my current stock of lights. I have only one mini mag which still uses a twisty head--it has a Nite-Ize in it. (I feel the Nite-Ize might be too dim for old eyes)
The head is very easy to twist, far easier than I expected. The tail cap is a little more difficult, but still very easy.
Could these lights (any lights considered) be modded to allow easier functioning?
For example, the o-rings could be removed, since I doubt grandma will be diving with them. The SL4aa turns very easily without the o-ring.
Add some friction tape to slippery surfaces, etc.
There appears to be many good choices, as long as they are easy to operate, provide good runtime (heck, most of these lights blow away the old 2D lights!), reasonably bright and take common batteries.
I think a floody beam would be best. (I believe even a tight beam with bright spill is not a good idea, because that bright center tends to wash out everything else)
My grandma loves the SL4AA7LED I gave her. She says "it lights up EVERYTHING!"
But...2 bats would have been more simple...and Quickbeam downgraded it.
That Radiant is looking better all the time.
An Everled/MJLED PR in a 2C mag would likely do, as long as the beam isn't too tight. Could diffuse the beam a bit. Tailcap might be a little tricky to turn--they tend to be very snug.
A minimag with whatever dropin you like should do. Terralux, Badboy, Madmax, MJLED, etc.
The Radiant seems like a pretty decent light. Quite bright for it's size, too--compared to a standard 2D.
But...don't the bats install BACKWARDS? Could be a little confusing.
I love the little Palights, but they are kind of...complex?
A simple "always on" with on/off, and the new Nichia CS would be a great nightstand light...as long as the bat change is easy enough.
You could make an "always on" light by jumping a resistor across the switch, allowing a tiny bit of current to the LED.
Always a good discussion...I thought about this a lot for my own grandma.
Maybe we should create a CPF "older adult light"!
Bob