I use their green light for hog hunting. I have it mounted on top of the scope with the plastic mount. It doesn't scratch the scope and it will stay in position for 2 or 3 shots. I use couple of tie wraps to secure the curly cord to the scope and the mount so it stays out of the way. I also use Velcro tape to secure the pressure switch to the forestock of the rifle.
I've lit up hogs from as close as 25 yards away and they didn't run. I've shined the light on feeding sounder from 50 yards for about 3 minutes and they didn't react. As long as you don't shine the light directly to their eye they don't seem to react very much. To minimize the chance of alarming hogs what my friends and I do is to point the light above the hogs and then slowly bring the light down on them.
Here is my "hog rig" consisting of Remington 700 in 308 and Bushnell 4200 scope with the light on top.