Basically, there are two DIFFERENT primary needs. That of a tactical user, and that of a general purpose user.
The tactical user needs instant access to a known state or mode and it's most often a need for the brightest or most visually disorienting for whom the light is unleashed upon.
The casual user typically wants the lowest brightest or the last brightness that was recently used, although initial state is typically not a life or death situation for a casual user.
First, let me say that I like the two button system employed by the M30.
The forward clicky is always on or off only. The 2nd button is used to select alternate modes with the light already on. If primary button is off, pressing 2nd button gives instant access to tactical strobe mode.
Well done Olight!
Something similar could be done with one button alone..
There would be 2 selectable general modes of operation;
1. Tactical
2. General Purpose
In the tactical mode, the foreward clicky sequence would be strobe, high, medium, low.
In the GP mode, the foreward clicky sequence would be low, medium, high, sos.
Selecting between the two general modes could be accomplished by 1/2 rotation of the head, or tailcap.
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