Читать книгу Patty's Industrial Hygiene, Physical and Biological Agents - Группа авторов - Страница 108

LEDs are solid‐state electronic devices that emit noncoherent optical radiation, generally over a moderately narrow wavelength band several tens of nanometers wide. LEDs are increasingly being used for illumination because they are relatively efficient at converting electrical power into visible or UV radiation; some LEDs now on the market have efficiencies of 40–50%. UV and blue LEDs may emit potentially hazardous levels of radiation.