Lighting plays an important role in peoples life. Proper lighting will make the room look comfortable and warm. In terms of indoor lighting, the best choice may be incandescent lamps and halogen lamps. Since these two lamps have strong color rendering index, which can make the colors of the room look better. However, the disadvantage of these two lamps is that they are very energy intensive, so we can replace them with LEDs. LED lighting has the advantages of environmental protection, energy saving, long life, and its color rendering index is also very good. We can also choose a variety of colors and brightness freely, and control the brightness of the room. Outdoor lighting is also important, because it can protect people from tripping and can make the pedestrians in the night more safe. Of course, some outdoor lighting requires us to save energy, such as solar powered lighting, wind LEDs and so on. Solar-powered lighting does not need to be connected to the power grid, does not cause environmental pollution, and the energy efficiency is very high. In summary, lighting can make people's life more convenient, and can also play an important role in the environment, so we should choose the appropriate lighting.