At night you’d want to be able to see. The candle has been run down over the years as a light source by lights and flashlights but their effectiveness has not gone away. Say it’s the middle of a storm and the power goes out, you don’t have any more light. You go to grab that flashlight that has been sitting there untouched since the last storm, but the batteries are dead and you forgot to go to the store to get more. You will turn to a candle to add light to the situation. Although, now it’s not the first choice, it’s one of the most effective