Mr Beams Light Shield Diffuser

I designed this light diffuser to keep the LED on the Mr Beams MB720 from poking me in the eyes when I walk past. I had an MB720 mounted higher on a wall, above key hooks, and it got me every time. No longer.

Printing: I emailed the file to a good friend who recently bought a 3D printer. He did all the whatnot then mailed it to me in a box. (I don't own a 3D printer yet. I know nothing about converting an .stl to something that exists in the world, so the printing notes below are total hearsay from my friend.)