I wonder why there just isn't a variable resistor on the side or something for that purpose like all of the other knobs on the things? Or an off/on knob that doubles as a brightness control. Could even be tactile with 5 positions or something.
I'd consider that to be over-engineering. It would make sense for someone who sometimes wants it bright, sometimes doesn't. But that's pretty rare. You either see that it is engaged, or not. Laser brightness is easy to tame by using a stronger resistor. It doesn't even cost more to do that.
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