Guest Editorial Special Section on Emerging Topics in Lighting

As is the case with global warming and resource depletion, the energy problem has become a global challenge. Since lighting is one of the main uses of electricity, improving the efficiency of lighting systems is a problem to be addressed. With the continued growth of urban areas and various large structures, such as shopping malls, transit interchanges, and hospitals, the need for lighting becomes more and more complex. Therefore, the demand for high-quality lighting is steadily increasing. In recent years, high frequency and high power density have become the inevitable trend in the development of power electronic converters. Also, because of the rapid development of the third generation of wide bandgap semiconductors, such as SiC and GaN, and other state-of-art technologies, such as wireless communication, switched capacitors, and OLED, the research on lighting system has presented additional challenges.