The bandwidth ends up being pretty large, so just about any UV light does the trick for most DNA types. Though there are many ways that DNA can UV light interac

The bandwidth ends up being pretty large, so just about any UV light does the trick for most DNA types. Though there are many ways that DNA can UV light interact to make viral DNA mostly unreplaceable, the primary interest is in dimerization. There are a few dimers that will form via UV radiation, each with their own absorption spectra. I'd just leave things in the sun for a bit. Clouds are transparent to most solar UV too, so just a direct path to the sun is needed. Rotate the objects a few times, maybe take 1.5-2 hours or so. However, for things that are also UV sensitive, like masks, follow the recommendations when the research has been looked over a bit. Use an oven. https://en.wikipedia.org/wiki/Pyrimidine_dimer https://en.wikipedia.org/wiki/Pyrimidine_dimer