As the COVID-19 pandemic is still posing a threat to worldwide communities, UVC light incorporated products for disinfection are becoming more and more popular. Common applications include upper-room UVC disinfection integrated with lighting fixtures or air cleaners, UVC light embedded robots, UVC light boxes and other portable disinfecting products. These UVC light disinfecting products usually deploy either mercury lamps or LEDs as light source. Currently, mercury lamps are more widely adopted for disinfecting products given its lower production cost and highe...