By 2027, LED lighting will be the predominant source of artificial light available worldwide, after a permanent transition that some physicians are concerned will cause unique, modern-day health risks.LED, or light-emitting diode, is a type of light that harnesses blue light wavelengths to create visible white light. In November 2023, delegates from 147 countries agreed under the United Nations’ Minamata Convention on Mercury treaty to phase out fluorescent lighting by 2027 due to environmental reasons, including mercury exposure, extreme energy waste and high greenhouse gas emissions.