That's one of the reasons I created this new light. The light comes on very slowly after the hogs have arrived at the bait. You can see what I created here: Home - Hogfader
I've heard some say that they've had the best luck when using a gun light IF they turn the light on when the muzzle is facing up and bring it down to bear on the target hogs... opposed to aiming the muzzle at them and activating the light, that seemed to spook 'em the quickest.