Energy saving lamps mainly use ballasts to heat the filament of the lamp tube. At a temperature of approximately 1160K, the filament begins to emit electrons (because some electronic powder is coated on the filament). The electrons collide with argon atoms, resulting in inelastic collisions. After the argon atoms collide, they gain energy and then collide with mercury atoms. The mercury atoms absorb energy and undergo ionization, emitting 253.7nm ultraviolet light, which excites the fluorescent powder to emit light, Due to the temperature of the filament during the operation of a fluorescent lamp being around 1160K, which is much lower than the temperature of an incandescent lamp from 2200K to 2700K, its lifespan has also been greatly improved, reaching over 5000 hours. Due to the absence of the current thermal effect similar to incandescent lamps, the energy conversion efficiency of the fluorescent powder is also high, reaching over 50 lumens per watt.