Print the following:
11 x panels (suggest printing with narrow brim to avoid warping at corners)
1 x base (use brim as above)
60 x clips (recommend printing in smaller batches initially to test tolerance is correct. Filament type and heat, e.g. even minor elephant foot, can affect the fit because they're so small)
1 x stand (optional draft version, but useful for taller 40mm light fittings. A better version is to follow, still work in progress. Recommend printing with supports.)
Work one panel at a time, attaching two clips to each edge and fitting the pieces together. Attach the base last!
For the light fitting, use a single source LED (e.g. some COB lights), and remove any pearl/reflective diffusers, otherwise multiple light sources will conflict and interfere with the shadow effect.