I recently bought a new Glock 19 and will be taking my CCW class next week. They say that 80% of home invasions happen at night and I would like to upgrade my Glock for this situation. My first thought was for a laser system. Then I was told that the person also knows where you are by following the beam back to you. Then I thought about night sights. But even though you know where your aiming you don't want to shoot at a shadow, it could be family. So then I was told to buy a tactical light. When you turn it on, it will cause temporary blindness and you will know who you are dealing with. So now, I'm thinking about either a tactical light or light with laser or light with night sights. I would like to hear your opinions on my thoughts.