I drove the truck to the furthest end of my property to pick up a sow I shot right before dark. On the way, 2 more hogs came TOWARD the truck with its high beam headlights on. They were neither "disturbed" nor "intimidated" by the truck or its headlights. In fact, I shot the larger of the two at 15 FEET in front of the truck in the headlights. If you are hunting where the incidence of artificial light is a "natural" occurrence, such as within a 1/2 mile of the highway, the hogs have seen headlights, white light, and probably much more (lightning) that makes me believe green and/or red light should give them NO PAUSE.