My workshop has a westerly wall and roof.   I built it with large window on that side so as to have plenty of lighting for my work.   What I discovered is that the objects on the work bench next to the outside wall were well lighted but any work I wanted to do using my equipment on the other wall required a lot of electrical lighting.  I knew that there had to be an answer to my problem without adding more lights.  After I approached a skylight manufacturer we were able to come up with a workable solution to providing light where it is needed.