I ended up going with this one. I can’t confirm the accuracy of the gauge as it hasn’t rained much yet and I don’t have an analog gauge to compare, but I suppose it will work fine as a rough estimator if it isn’t accurate.

There’s no app or account required which is the biggest selling point for me.

I got into Hue way back in 2014, before I knew what HA was, and before I cared about local control. Hue is OK, and they have a wide variety of form factors to choose from, but I’m always afraid they’ll enshitify to the point you can’t pair the bulbs with a non hue zigbee controller. I’m pretty sure I can’t update the bulbs unless they’re connected to a hue bridge.

Using smart bulbs to mitigate the lack of in-wall plugs/switches is a great idea. I do that with my bedroom fan since the light chain is busted.