That is certainly an unusual interface.
People in general want quick simple access to three things from off:
- The lowest mode.
- The highest mode.
- The last-used mode.
… and during use, people generally want quick simple access to some other things:
- Off.
- One level brighter.
- One level dimmer.
- Turbo. (momentary)
Sounds like it gets the first set, though through unconventional means. And it skips half of the second set.
These are just the basics, the core functions people use the most. And generally they should be mapped to the simplest inputs. So it’s particularly odd that the simplest possible input, single click, does something which isn’t on the list.
I think I get why it’s designed that way… because it keeps the light sort of locked out all the time and prevents some types of accidental activation. And to let people know it’s not broken, a single click at least gives some feedback. But if a light is crushed in a bag or something, it’ll tend to cause “hold” actions… which turns on the light. So it’s not a very effective lockout style. And it forces people to unlock it every time it’s turned on, which is inconvenient, especially because it has no way to change brightness while on. So a brightness change involves a trip through the lockout mode.
Very odd.