Situation: I am facing a table and there is a shelf behind me.
Alternative situations: I did my work at the table and to my left was another table. After looking for some fax prinouts on a shelf behind me, I am about to answer our clients via e-mail, while there are more people working at the table in my 10 o'clock direction.
Question: What in front of me do I need to open to allow more light into the room?