An Adafruit LTR390 UV light sensor mounted on a plastick bottle top atrached to a Solar Panel Sensor project.
My solar powered #raspberrypiPico sensor project that's been running for a couple of years. At some point the plastic cover has come off of the #adafruit UV sensor,amazingly it is still working even though it has been raining. Putting a temporary plastic bag over it has made it more sensative, bonus