you will want a good light that has a good spot. and by that i mean that it doesnt have a lot of light going into a "flood type beam". all the light should be concintrated into the "spot". as long as you dont just fire it up and keep it going its not to bad on them. when you light it up and just keep it going all you will see is their shadow as it booking it out of the county. good luck and just make sure of the eyes you are shooting. dont wanna shoot some guys cow or a deer by mistake.