Like pageyjim, even though there are lights everywhere in my house, the one in my pocket is often the most convenient. It isn't often I get lazy but EVERY time I don't pocket a light around the house and garage, I'll need one several times until I do put one into my pocket. Off the property or in the car (which has it's own stash of lights) I'll always take two and on occasion, three lights.
It may be no coincidence that I'm a flashaholic CPFer. My folks always had a couple D cell lights at home & in the car. A flashlight and lantern were early toys they gave me. The value of a flashlight hit me when I was still in grade school. I found that it was often easier to find something in a closet, cupboard, under or behind something, or a tiny object on the floor. Many decades later I'll need extra light to read a label somewhere.