Now, before we proceed with our first lighting step, I do need to add a disclaimer here. The choice regarding whether or not to add this step is purely a matter of personal preference. Not all visualization artists include it in their personal workflow, and so I would recommend that you try lighting the scene both with and without it. In the end, simply weigh the time it takes to include it against the extra (if any) quality that you feel it adds.

Having gotten that out of the way, one thing I always like to try and do when starting an interior lighting setup such as this one is get at least a hint of the outdoor lighting conditions to show up on the interior render. In this instance, this would mean bringing some of the ambient light from the exterior moonlit sky to the inside. This generally speaking amounts to a subtle effect that should add just a small measure of purple and blue tones to the dark or shadowed areas of an interior image.

It is, to be honest...