Be careful with power ratings of torches, there is always a compromise between size power & usable light. While those bigger lenses & batteries may have more power, you might get a bit fed up with all this clunk on top of a precious scope, its certainly unwieldily more prone to getting knocked weightier etc.Foxes will move further away. Also the amount of water in the atmosphere has a huge effect on effectiveness, you end up lighting the night sky but not seeing more than sixty yards through scope magnification. Moon phase plays a part, dark nights give you a clearer picture but foxes are more sensitive to a lamp. When the moon is up, they don't notice the lamp going on them so much. I shot plenty of foxes with a Nightmaster & Deben tracer, crap dimmers though, they would cut out before dimming right down. Also the mounts were awful plastic affairs, broke easily. The mount for the wicked lights I believe is all metal but make sure, has thumbwheel for elevation & windage. The light itself is focusable, from square spot to flood, at tight focus you see a bit of strobing at low power, lines in the picture, but adjusting focus very slightly helps. With the dimmer right down you will pick its eyes & with a bit of squeaking you may get it to come in to those vital 30-40 yards, up the light & clang it. If only Wicked lights had an orange pil. Best lamp I ever used was a Lightforce with a dimmer & amber filter, but it ran off a car battery & needed a extra man. You will find out that a dimmer is your best friend. Hope that helps.