Ultraviolet (UV) light usually are light waves with 100 to 280 nanometer (nm) wavelengths, according to a report by Chinese-language newspaper Science and Technology Daily. These lights are mostly used to kill germs, used medically, and in biochemical tests. At the same time, UV LEDs advantages have inspired many new consumer electronics to adopt these applications, for example in white household appliances disinfection modules, portable water purification systems, smartphone disinfection and others. It shows wide market applications, and has become the next popular global LED R&D and investment field after semiconductor LED.