I guess I do this inadvertently. For example, I carry a nice Fenix with fresh batteries, but I also carry a little fauxton on my key chain. The fauxton is good enough for most activity in the dark. Also, I'll freely allow somebody to have my fauxton. I pull out the Fenix when I need to see across a field, up a tree, etc. It would have to be a real emergency to hand over my Fenix to somebody.