In addition to water, air, and food necessities, human life has always affected people's work and rest, and has been living on the sunrise and living in the sunset. It was not until 1879 that Edison invented the electric light bulb (incandescent lamp). Its principle is: when the lamp is connected to the circuit, the current flows through the thermal effect of the filament, causing the incandescent lamp to emit continuous visible and infrared rays. This phenomenon raises the temperature of the filament to 700K. It can be noticed that most of the energy is wasted in the form of infrared radiation due to the high temperature of the filament during operation. At the same time, due to the high temperature of the filament and the rapid evaporation, the life is greatly shortened, about 2,200 hours. The luminous efficacy is about 12 (Lm) per watt.

In the past, the Lighting system only focused on quantity, but today it has gradually moved toward exquisiteness and pay attention to energy-saving effects. Due to the widespread use of lighting technology and lighting fixtures, people's living standards have generally increased, the demand for lighting equipment has been increasing, and power consumption has also increased. Therefore, attention has been paid to the development of high-efficiency, high-quality lighting equipment.

The electronic energy-saving lamp mainly heats the filament of the lamp through the ballast. At about 1160K, the filament starts to emit electrons (the electron powder is coated on the filament). The electron collides with the argon atom to collide, and after the argon atom collides, it is obtained. The energy collides with the mercury atom to absorb the energy, and the transition produces ionization; the ultraviolet light of 253.7nm is emitted, and the ultraviolet light excites the phosphor to emit light. Since the temperature of the filament when the fluorescent lamp works is about 1160K, it is lower than the temperature of the incandescent lamp working 2200K-2700K, so it The lifetime is also greatly increased to more than 8,000 hours, and because it does not have the current thermal effect of incandescent lamps, the energy conversion efficiency of the phosphor is also high, reaching 60 (lm) lumens per watt.

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