light loss through egg crate?

[Bowza99]

Does anyone have an exact amount of light loss through eggcrate, glass, a mirror (which may be the same as glass), polished aluminum

 

[House of Laughter]

Well, i think I can safely say that no light travels through a mirror or aluminum.

House

 

[jhale]

for the eggcrate it also depends on how close the light source is to it. the closer the light the larger the shadow it will cast.
I'll have to second what House said. do you mean reflecting off those sources?