https://en.wikipedia.org/wiki/Solar_water_disinfection https://en.wikipedia.org/wiki/Solar_water_disinfection has a lot of great information on doing the same t

https://en.wikipedia.org/wiki/Solar_water_disinfection https://en.wikipedia.org/wiki/Solar_water_disinfection has a lot of great information on doing the same thing for free using sunlight. Perhaps of most interest is the rather long set of cautions. These would appear to also apply to a commercial lamp also unless it was sufficiently powerful and applied properly. Sadly the tag line on the web site stating that it only kills 85% of germs seems to suggest that the solution is not particularly effective.