There comes a time when my collection of various battery/kerosene light sources comes in handy. Like now. It’s 8:30 pm, cold & very blustery winter night. I use gas only for hot water, everything else runs off power.
I have a neat camping lantern that has two detachable torches on it, so three rooms can be illuminated separately.
I can still boil water, I use what’s called a bush kettle for that, essentially it’s a 1.25 litre water jacket around a central chimney. It’s constructed from aluminium, has a kiln-dried blackwood handle & can be fuelled by metholated aka white spirits.