I have witnessed one too many times of people mounting things on firearms that fall off, get snagged or malfunction.  The more you put on a firearm that needs to be tightened or screwed on, the more you better pay attention to how it is mounted and verifying that it has been locked in every time you expect to use it.   I haven’t caught on to the handgun white light idea because considering the distance I would use a sidearm inside my home, holding a flashlight while shooting a Glock vs having it on a Glock doesn’t really mean much to me.   I’m not going to be taking 25yd shots where I need a better shooting grip to get good shots.

Mounting a white light on your gun may also mean  you can’t use your gun holsters anymore and you’ll have to run out and pick up a new one.   Keeping a gun in your bed side safe with a white light is very practical.  Streamlight flashlights make the TLR-1 and TLR-2 that gives you the option of a flashlight or flashlight and laser.  I’m a fan off certain types of firearms for me, but there are guns that I would issue to less trained loved ones with certain accessories because they are easier to manipulate or handle.   I’m a big fan of shotguns and battle rifles, but that is too much for a fragile person to handle inside the home.  I’d feel better issuing a Glock 19 with a white light than a 1911 with a manual safety for someone less trained to deal with recoil and stress.