Modern light bulbs use inert gas, usually argon, which greatly reduces the loss of tungsten. When tungsten atoms evaporate, it will collide with argon atoms, and no combustion reaction will occur, because inert gases usually do not react with other elements. The light bulb is cheap and easy to use, which has proved to be a great success. Light bulb is still the most popular indoor lighting choice. But it will eventually give way to more advanced technology because it doesn't save energy. Most of the energy emitted by incandescent bulbs is in the form of thermal infrared visible photons-only about 10% of the generated light is in the visible spectrum, which wastes a lot of electric energy. Warm light sources such as fluorescent lamps and LED lamps will not waste Dali energy to generate heat and emit most visible light. Therefore, it will gradually replace the light bulb and become a new lighting tool.