Cheap flashlights are not good... buy good ones and scatter tam around the house where people can grab one if power fails. I use Maglight AA cell flashlights and have a dozen of them around here. Make sure they are LED for long battery life! And a neat trick is buy those outdoor solar spotlights, put the solar panel outside and mount the light inside the house as an emergency backup light. They are motion sensing so come on when someone enters that room.