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It doesn't really matter for this application, but Polycarbonate, which is also sold under the brand names Lexan and Makrolon is a different material than PMMA (Polymethylmethacrylate), sold under the names Plexiglas, Acrylite, Perspex, etc. aren't the same material.
Built up a similar setup it in the lab using a function gen and a strobe light. The effect is quite impressive, and now I really have to build a proper one for myself.
Just decrease the shutter speed to something like 1/30 s.If you only have automatic control, just dim the frame and environmental light.