Always, every day. If I go to take a shower I leave the light on the counter where I could find it quick in case of a power outage. I am carrying a ZL sc64c LE, which is great, though I wouldn't mind having a HDS (my edc for 3 years until lost in the woods) or Malkolf 18650 light. Even at night I either have a light clipped to pjs, under the pillow, or on the night stand. I also used to keep a Peak Eiger SS high CRI lug on my key chain on a S hook, always on my belt loop.
That reminds me, I need to get another one. 2 lights are a must, because sometimes you hand a light to someone else to quickly borrow, and find you need one yourself really quick. I also keep a spare 18650 in a match tube in my pocket at all times unless wearing gym shorts. My philosophy is that I always need 3-6 hours on high at any given moment. And yes, it has come up where I needed to have a light on high over three hours, to help dig a sunk truck and trailer out of sand. In that case there were a half dozen adults and I was the only one with any sort of non-phone light as we were driving through the desert sand after dark. :thumbsdow It was that event that really pushed me to 18650 lights, AAA and AA just don't cut it for runtime/output on a main EDC light. Zebras are compact enough now that they are smaller than most AA lights with 3x the power. Of course for something like a nightstand or reading and writing light you can't beat their flood headlamps.
So for me the typical strategy is
1 18650 light + Spare fully charged battery
1 Backup light, bonus if keychain sized
18650 Headlamp and another spare battery in bag, or in person if specifically going out to work at night.
I also EDC a leatherman, and usually a pen and pocket composition notebook, important in case you need to take notes or remember something. I have started a dream journal, and that .05 lumen setting is really handy to jot down quick notes in the middle of the night without loosing sleep.