Here's a study from life that I did a while ago. The little guy made such pretty reflected light!
This was actually painted in Lab-mode, which I've been experimenting with lately. Most of the time the differences to RGB are barely noticeable, but there is probably a lot more to discover. One thing that stood out to me was that in Lab the colors seem to behave like light, whereas in RGB they are more like paint - the best example for that is how red and green blend.
I might try switching back and forth in one painting and see how that goes!