This LED Bulb Sold As Germicidal Doesn’t Emit UV-C

Germicidal lamps are designed to destroy viruses and bacteria using ultraviolet light. But not just any UV light will work, Hackaday came across an example of a lamp that was advertised as germicidal but a few things just weren’t right about it. They attached the official datasheet with the measured wavelength: it was not 253.7 nm, as advertised, but with the peak at 394.3 nm, and the dominant wavelength at 413.9 nm. It was not in the far UV-C, but in the near UV-A range and not at all useful for destroying germs!