In 2022, UV-C tube sources still have a higher efficiency and optical power than LEDs as they already have been around for decades. In response to the COVID-19 pandemic, UV-C LEDs have made their way into mainstream markets and have seen a huge improvement in efficiency and optical output. The absence of hazardous Mercury is the most relevant argument in favor of UV-C LEDs when compared to UV-C tubes when it comes to complying with the Minamata Convention on Mercury, a program aimed at phasing out the use of Mercury in electronics and other products.