Can get LED units.

https://www.aquisense.com/
https://www.klaran.com/

are two brands/makers.

Such a thing has never occurred to me. Interesting.

Whoa, even better! UV LEDs would be much safer than UV mercury vapor lamps.
Many thanks,
-Blast

Here in TX you're allowed to capture rain water for home use but it's specifically required to undergo UV sterilization before coming out of taps. It seemed weird when I first learn that but now I coming around to the logic.
-Blast