If you're talking about the Walkabout hand held light, the switch does make a little click. You can get around this by leaving the switch on the light in the on position, and use the rocker switch on the bps battery pack. The rocker switch can be silently operated between full on/ off/ dimmer positions.
On the scope lights, there's an inline switch that attaches to your firearm with velcro. This switch is almost silent, but again, you could leave that switch in the on position, and operate the light from the bps switch on the battery pack.
I have both lights, and don't think I've ever had a critter spook at the sound of a light switch being operated.
F1
