There is no click-wait-click in the default Anduril UI. There is too much stuff to memorize, but most of the complexity is for configuring the flashlight the way you like it (indicator colors, UI options, etc.). I.e. you buy the light, sit there with the manual setting it up, then leave it that way. Then it's just click on, click off, hold the button down to make it brighter, click-and-hold to make it dimmer, or double click to temporarily access the brightest level. The other stuff is not worth trying to remember.
If I remember, 3C checks the battery voltage, no need to remember that. 2H, turbo level, that is only on some lights. I don't think mine has it. Park ranger should just set level 4 and say click on, click off. Park rangers usually won't lend out expensive lights like this anyway, I'd expect. It is intended for a nerdy user who wants a fancy light. Anyway, you can reprogram the UI any way you like.
No normal person wants to memorize a click-wait-click-click.
A few buttons might look ugly, but watching a frustrated old person fiddle with gestures is uglier.