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draft video


400nm uv 5050

https://www.youtube.com/watch?v=G-Vf9Jz_2Mw&feature=emb_title
https://www.newswise.com/articles/narrow-wavelength-of-uv-light-safely-kills-drug-resistant-bacteria-finds-columbia-s-center-for-radiological-research
https://www.youtube.com/watch?v=8fh4LfUc-AI