And get a nice bright weapon mounted light and keep your house as dark as possible. I have a Streamlight TLR-1s, which set me back $120 mounted but worth it, imo. It has a momentary switch and an always on/off switch....very cool and easy.
Try this sometime...get up about 3am and walk around your house so you eyes get adjusted to the dark. Then take a 2 second 160 lumen light flash in your face at 10 yards and then look around and see how well you can see.
A light:
1. Let's you identify the target. - You can't go shooting at random sounds in your house. Especially in a busy neighborhood or if you have other family members. I would never fire at an unidentified target simple b/c the target was in my house. It's not worth the consequences for me. I don't want to kill a kid stealing my Xbox....sorry if you are such a warrior that you would do it b/c you are allowed by law to protect your house.
2. Shocks/disorients/blinds the target. - From my example above, they are now temporarily blind. If they already have their gun out they might try to shoot at the light but they sure won't be able to see your body or anything, they'll be blind firing. While you, on the other hand, can see everything in front of you.
3. Gives you 1-2 second drop on them after you identify if it turns into a firefight. It will naturally take their body at least 1 second to react to being blinding before they can fire (if they are armed). If they are unarmed, nail them with the light and yell loudly at them to get the F down on the ground NOW as they are about to get nailed with a load of 12G buckshot! They'll probably crap themselves and get down or try to run out the door which will be hard for them to find since they won't be able to see much. If they are armed, I'm shooting first.
They only drawback is that it can give away your position, but this drawback is small compared to the benefits of a light.