Not that hard to get them, your big box store has them in the pool filter section. In 2020 these instructions came out how to build a UV sterilizer for cheap:

Not that hard to get them, your big box store has them in the pool filter section. In 2020 these instructions came out how to build a UV sterilizer for cheap: https://makezine.com/projects/build-a-diy-uv-c-sterilization-cabinet-to-fight-covid-19 https://makezine.com/projects/build-a-diy-uv-c-sterilization... And no, not safe without precautions.