I used the black mesh from Lowes, always available in their gardning department, and there is no problem with shade etc. The mesh is so thin that it doesn't affect the lighting at all. I know there are some people on the board selling their scraps of clear mesh, don't waste your money. For under $10 you can get all the black mesh you would ever need from Lowes.
Also, I used the aluminum screen frames, and after more than a year there is no sign of rust etc.