Stages of a Painting

This is going to go through a lot of stages...   Today I realized that I'm not used to painting with natural light while inside a studio.  My South-facing window, which seemed pretty constantly bright to me, does in fact include reflections in the morning that are gone by afternoon.   The question is whether to include them or not.

I painted in the reflection today, and, in order to make the lights more luminous, darkened and dulled the shadows and interior wall to a color closer to the real silver-green paint on the walls.  Interesting, definitely both improved and diminished the effect I was trying for.  To make the range of light, reflection and shadow just in the window alone, I've got a range of blues, grays, greenish blues, violets and cool whites...and I think the result is pretty mixed.  The cerulean in the upper right corner definitely has to go.