We just installed a skylight. The picture is attached. Sorry for the poor cell phone quality photo, but it shows everything that's relevant.
How can we make the skylight bring more light into the room? Of course, one way is to paint the walls of the shaft white. But can we do more by, for instance, installing some sort reflective material along the walls marked with red? The most extreme example would I guess by thin mirrors cut to the shapes and sizes of the shaft walls. If this is not feasible, why? If it is feasible, what options do we have?