If you can't identify your target,how do you know it's not friendly.If you hear a noise in the night,how do you know that other people in the house might be investigating the noise.If you do a little research you would be amazed how many friendly's are shot each year.If you ck out some of the experienced people on you tube,ex armed forces ,police officers,they tell you the first thing to add to your rifle is a white light,for home defense.imo.