Kitchen Rough Lighting

Here are some very rough, photon-mapped shots of the kitchen. They consist of a beauty pass and ambient occlusion pass, with some very basic compositing. All of the shading you see is either the default Lambert or a basic Blinn. I'm taking a different approach to the interiors from the way I tackled the exteriors: I'm starting off with very basic lighting before I move into the texturing, so that I can see how much I can tailor my texturing according to how much the lighting is accomplishing. When I took a lighting and rendering class last semester, I gave myself the challenge of using lighting solely to convey the mood of scenes, even if it contradicted the subject matter. For example, I would try to use warm lighting on a disaster scene to make it look more calm, which using very cool lighting on a home environment to make it ominous.

This has a warm atmosphere to convey when my grandmother was still healthy and cooking frequently:

This shot has the same render settings, but with differently colored photons being cast. I'm trying to go for a cool tone, to convey how the kitchen was in disuse after my grandmother became sick with cancer:
Here are slices of the raw passes that went into the above images:

Clearly, there is plenty to go on these shots, but as I said, I'm trying to get the lighting in the ballpark before I start texturing.