After reading the different arguments for and against having a weapon mounted light, I have come to the conclusion: Tritium night sights are a must, and a light is a good "option to have". I am going to get a good weapon light, possibly with a strobe feature, I am going to try it out in the Practical Shooting Pits at my gun club. If my shooting does not suffer then I will probably attach one to my HD pistol. I still maintain that the first encounter should be a suprise, lethal counterattack, then use the light to make sure the threat is neutralized. I would guess that if the attacker is not alone, the others are heading for the exits, if not then the light will help to confirm the next target. It has been said if invaders have entered your home you have already failed in securing yourselves. I would recommend other security measures besides your wits, weapons and tactics. First good locks on all doors and windows, make the attacker break in making a lot of noise. Storm doors with impact resistant glass (tempered glass) are on all my entrances. My Bedford stone home has the high tilt out windows that would very dificult to enter even if opened, all are locked and double pane glass. Motion sensor lighting (outside is common) inside home's common areas, could give the defender a definite advantage, and are cheaper to acquire than a good tactical light. Be proactive, be creative, like a steel security door to bedroom ( I don't have one ), yet. I do not have a tactical weapon light, yet.