How do UVC lamps reduce germs?

Even though the entire UV spectrum is capable of reducing germs, the UVC energy with a wavelength of 100 to 280 nm provides the most germicidal effect with 265 nm being the optimum wavelength for damaging the DNA and RNA of the germs. Second Wind UVC lamps operate at a near-optimal wavelength of 253.7 nm and distribute a strong germicidal effect to reduce the germs that pass through the UV air purifiers.