Which style switch do you prefer, push button or dimmer switch?

[XTAR]

XTAR DH1 and DS1 dive light are designed for spearfishing. Both of them have the focused beam with a high lumen output, effective at spotting fishes and lobsters in caves and holes. While, they are featuring a different switch style. Which kind of switch you prefer?

XTAR DH1 – Push Button Switch with locking function
* Quick and precise on/off control
* Ideal for fast reaction in hunting situations
* Reliable even with gloves

XTAR DS1 – Dimmer Switch
* Adjustable brightness for different conditions
* Smooth transition between light levels
* Helps avoid startling fish with sudden brightness

 

[Ukmc]

I was trying to figure out from the photo - is this dimmer switch a button that slides up and down?
Normally I prefer a button, especially if there is a way to lock it to prevent an accidental activation.
If this dimmer switch is a sliding mechanism - how would one prevent an accidental turning of the light or an accidental movement of adjustment of intensity?

 

[d^2b]

I was trying to figure out from the photo - is this dimmer switch a button that slides up and down?
Normally I prefer a button, especially if there is a way to lock it to prevent an accidental activation.
If this dimmer switch is a sliding mechanism - how would one prevent an accidental turning of the light or an accidental movement of adjustment of intensity?

I have a (non-XTAR) light with a slider and I have to keep the slider under an o-ring to prevent it from accidentally turning on. FWIW, my preferred option is a push button on the tail of the light, recessed to prevent accidental power-on.