Let's say you hear a noise in your house in the middle of the night. You grab your trusty weapon, with flashlight locked in place on the weapon. You move though the dark house, using your weapon's light for illumination. All of a sudden, you hear a noise and catch a glimpse of movement off to the side. You point the weapon at the source in order to illuminate it - and realize you're pointing a loaded firearm with a hair trigger at your four-year old girl who sleepwalks.
I don't think it's the best way....