It's 2018 and every person who is seriously using a gun to deal with bad guys in the dark has a light on it. And the lights, even when used inside buildings that contain white walls and mirrors, are made by Surefire or Streamlight and have between 800-1000 lumens.
Now if folks don't want a light then by golly they shouldn't have one. But don't pretend that you've got something figured out that every professional on the Earth doesn't.
