I do have add on lasers for two of my guns, but only used them to sight in, and some practice.
If the BG gets in my house, he will definitely know where I am! I will be the guy behind the gun flashes, that he sees just before he hits the ground.I do carry a mini flashlight for nite times.
Now if he is outside, I do not plan on shooting unless he runs (toward me). But if he is in a vehicle, that thing is fair game. windows, tires, engine compartment. (I live far enough out that they sure as heck are not gonna walk to get to us).
We are already on the look out for a Red PU truck, with two to three in it, that did a couple home invasion things, where there were older people. "I am older, but with at least one gun on me, and three more close by, I think I can make them welcome, or unwelcome depending on their choice"