How do i reduce the intensity of uv light by changing the distance from the source?

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Yousef Ramadan Gab-Allah

Yes you can. The intensity of different light sources changes in the same way. The intensity of light is inversely proportional to the square of the distance. That is the equation you are going to use, when I (Intensity) and d (distance):

I1/I2=d2(square)/d1(square).

Rakesh Bhandari

When you increase the distance, you may also add an aperture to avoid light spreading to areas where you do not want.