Staging Lights in Learning Environmentz?

How important is the light when it comes to learning? We know of some studies from the States that natural light has an effect on learning.  In a study from Sacramento 1999 they compared groups of students and their test results. The students who worked in natural light performed better than those in light from bulbs. 

But what do we know more about the importance of light and especially now in 2013. It is a bit more complexity to the story than the study above shows, but it is probably a lot of truth in it. It seems logic that the light quality does matter for peoples performance, don´t you think. On the other hand, we know nothing about how the students worked with their learning (methods), how the physical environment in general was constituted, if it was the same teacher etc. We do not get a clue about the "Learning Environmentz" out of an holistic perspective in that study.

What if we think in a different direction here? Can we control the processes of learning by staging light in different ways for different purposes?

We'll try to take a deep dive in to this "light designer thing". We want to learn more. There should be loads of people out there who have stories about this and perhaps some research results? In the film business perhaps? Music Business?

If you have any ideas or knowledge about this kind of things, just let us know.