I move through my house with lights off and snap caps in my tactical shotgun or pistols with night sights. I practice this routinely so it is a “memory” thing. I have had my alarm go off and was “instinctual” in moving to sweep the house. So for me it keeps my low light training for shooting current in my realm and if I am confronted it will be a instinctual reaction. Now I have no children in the house so, some scenarios for me are different than may be for others.
I routinely carry (CCW) and this helps me to be alert and what is around me also that goes back to my training scenarios.