Maybe integrate it into the weather app? Then it could display the moon at night. There is some limited use for having it part of rules also. Although I think it might be useful as a % value that could be used (full moon would be 100%). Example:
IF >Sunset and <Sunrise THEN Moonlight dimming % = Moon %
Of course that example has 3 changes:
1) <> Support related to Sunrise/Sunset feature
2) Setting a dimming % with a variable instead of discrete values
3) The moonlight % itself
Just for the context of the idea, I am also in the aquarium hobby and some people use moonlights above their tanks for late night viewing/natural effect.
