I owned, until I just sold it recently, a portable indoor live shoot firing range that used HD projected bad guy scenarios. The trainees used live rounds in their guns. The lighting was intentionally poor near the shooter. I often saw many unintentional high shots because the shooter had the front sight and bad guy in view, but dropped their wrist slightly because their rear sight was not picked up in the low light, resulting in high shots. The shooters that had lasers seemed as if they were "cheating", because in the low light, they simply put the dot on the perp, fired, and down went the bad guy. I know many people have reasons they give to not want or like lasers, but after seeing laser's utility and superior first shot effectiveness in these high adrenaline shoot scenarios with all the shooters that used them, I'm sold. The usefulness of lasers in low light situations has been proven to me beyond a doubt. All my self defense handguns have one on them now.