If power outages are likely, rather than this being a one-off, then you may wish to consider a fixed emergency lighting installation in your home.

This is easily done, install an additional circuit, not connected to the mains supply.
Fit one or two wall or ceiling fixtures in each room, controlled by a wall switch.
Under normal conditions, this circuit is connected to nothing and will not function. When the blackout occurs, connect this circuit to a 12 volt battery, preferably a deep cycle battery, though a vehicle battey will serve.
The fixtures must of course be fitted with 12 volt bulbs, of low power.

Alternatively connect this extra circuit to a UPS, and insert standard 120 volt low energy lamps.
A 1,500 watt UPS should supply 150 watts for several hours, and 150 watts is a dozen smaller low energy lamps.