Measuring wall brightness with glass-fiber paint

[sheremyjockey]

I have to design an experiment that tests how bright a certain wall gets when glass is mixed in with the fibers of the paint. I'm thinking that there is some device to help measure the illuminance or intensity light that is reflected off the wall. However, I may be way off base and am completely missing the point. Please help!

 

[WMGoBuffs]

What you need is a light meter. Any local camera store (not a 1-hour booth, but a real camera store) will have these. It's a hand-held box with a white half-sphere on the top of it.