Like Mog, I lived without electricity for 13 days following an ice storm during winter, then the following fall, for five days following a major outage originating in Ohio that blew out much of the northern Midwest.
It was at times inconvenient or uncomfortable. I had a gas stove, so I baked daily to keep the house's pipes from freezing. Our water heater was gas, so we could shower--but getting out was a test of a person's courage. I spend time in public places that still had power, like the library or the mall, while our young kids were in school, then shuttled them to grandma's, where the condo (wisely) had a generator. They did homework and played, under her supervision, while I made a meal and brought it over for dinner. We took them to a public place afterward, returning only for bedtime; they slept there and we slept in the dark house, arriving at Grandma's in time to get them ready for school.
Like Enguerarrard, I wasn't happy with the quality of light from non-electric lighting. It wasn't comfortable to spend an evening reading by the fire after the kids went to sleep. But we could share a bottle of wine and play a board game or talk.