I know every home, every situation, every encounter is different. I live in a two story home. The only way upstairs to our sleeping areas, is a L-shaped set of stairs with a blind corner. If I heard a intruder in my home, I would position myself at the top of the stairs behind a door opening. "I have cover and it is a very defenseable position." That position overlooks the blind corner of the stairs. I would turn the stairway light on. This would light the blind corner of the stairs. I then would tell the intruder to get out of my home and that I have called 911. If he would not obey my orders too leave, and come up the stairs I think he might have made the worst mistake of his life.