I don't have to have fully programmable.
But you know how they have a H1 and H2, and M1 and M2? I wish that there was an OFF1 and and OFF2.
I'm not making a joke. What I means is this:
With most of my ZL's, I like to keep it on the absolutely lowest L2, the 0.01 lumen or thereabouts, and then set it on my night-stand when I am traveling. That way, no matter where I wake up, I can find the light. Not so bright that it keeps me awake, but instantly visible if I do wake up.
But then I'd like to be able to switch it to a slightly higher L2 for walking around in the dark. And I can't do that without reprogramming L2. And L1 is just too bright--1 lumen is *way* too much for dark-adapted eyes.
So what I'd like is if they gave you the option of having OFF1 as the regular total off, nothing but parasitic drain.
And then OFF2 would be the merest flicker, like a 0.01 lumen setting.
That would free up the L2 slot to be a more usable low, like the 0.34 lumen setting. Good for navigating a dark room, not so bright that you lose night vision.
It would be like having a battery-powered trit-tube in it all the time. And of course if I don't want it on, then I can always switch to OFF1, or just back off the tail cap a little to lock it out.
Make it so!