Only candles we have are decorative. Little girl and boy pilgrims and the like. I have a 220 volt gas generator. During my ten days without power from Sandy we used it judiciously. My boys waiting on gas lines to keep all tanks filled. On cold nights fired it up in the evening to power the oil fired burner for heat and hot water and shut it off at bed time. Fired it up for an hour or so in the AM for the same. Actually it got warm during the day. It easily powered 2-3 air conditioners ( what a luxury!).
We never ran out of gas that way but it was always on our minds. Power out for 10 days and never lost cable. When the power was on we watched TV and had WiFi.
I have about 7 gas containers continuously filled. It only took once to run out before I said, "Ooops!"
(My best bet would be a generator that runs on propane, as I have a quite large tank of that for house heat primary - fireplace secondary.)
You can keep your wifi on all the time with a battery. I have several large AGM batteries which are pricey plus solar panels to keep them charged, but I can keep my small fridge cold and wifi and other electonics going indefinitely.