Without the lightbulb, our lives would be drastically different. We would have to rely on natural light from the sun and moon to illuminate our homes, workplaces, and other areas. This would mean that people would have to go to sleep earlier and wake up earlier in order to make the most of the daylight hours. We would also have to rely on candles and oil lamps for light, which would be much less efficient and much more dangerous than the electric lightbulb. This would mean that people would have much less time to spend on activities such as reading, studying, and working in the evenings. Without the lightbulb, we would also have to find other ways of heating and cooling our homes.