These days there are only a little people who are likely to imagine their life without having an access to the light bulbs. It is implied by the fact that without them we would have to live exactly according to the so-called rhythm of the nature, which implies that we would have to wake up each time sun rises and go to bed every time the sun would go down
Lightning is a field a variety of us have good associations with. It is connected with the fact that, first and foremost, owing to having some lights in our house we are able to for example more properly deal with the darkness and work longer even if it’s dark outside. Presumably this is one of the most influential inventions that has been created in last millennium, as due to it people obtained a chance to work longer.