And now for something completely different…
Nothing to do with ST but if your looking for something else to stick an LED light on you need look no further
Faucet/tap LED lights, no batteries required
We use them and they work really well, no doubt also available in USA and other parts of the globe
If you live outside of the UK there is much research on Lead in drinking water, therefore using a water treatment system in your home is advisable, however using a faucet LED which is approx an inch long as opposed to the miles of unknown underground pipes leading to your faucet would be of zero concern