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UV LED lamps emission spectrum: what's the difference with traditional UV

UV LED emission spectrum

UV LED lamps radiate a different emission spectrum from the one of traditional mercury UV lamps. Emission peak is always very selective, focused on precise wavelengths, which generally are 365,385, 395, 405 nm (±5nm). So it must be considered a virtually monochromatic radiation. Consequently the irradiance of the wavelength emitted by the UV LED (e.g. 395 nm) for powerful UV LED segments is significantly higher than the irradiance of a UV medium-pressure lamp for the same wavelength. There is not emission in the ranges UV-B and UV-C and also in the visible spectrum the emission is minimum. 

 UV Led 365, 385, 395, 405nm spectrums, compared with spectrum of UV Mercury traditional lamp