Shower Light Joist Mount

If you're cheap like me and bought something like https://www.homedepot.ca/product/generation-lighting-4-frosted-glass-shower-trim-white-finish/1001772277 to add some extra light in your unfinished basement only to realize that you had no way to mount, I created this frame to mount to a joist.

I created it with back mounts and spaces for M3 bolts but, if you get the measurements right, the pressure fit seems to be enough. Recessed holes for the screws to the joist.

I've included the SketchUp file for you to make your own adjustments, as need.