Hey anasasis. I started with the physical sun as a base. But being that there is a roof, floor combined with the angle of sun there really wasn't much light provided for this room.
What it helped to do was soften the light overall.
All that was added was an area light where the window is and another up where the skylight is.
GI helped to even the lighting out overall and a LOT of tweaks to both area lights.

Probably over 20 hours spent on this lighting setup to get it as clean as it is. If you're more interested in the actual numbers and placement of the lights let me know and I can get all that down for you.

-Alexander