Found out I got this late yesterday while leaving work.
I enjoyed one of the two all evening, showing it off, discussing it with friends, wondering what color to make it. Night falls, my nite-light is a blacklight, and I realize that compared to every other white in the room, wsf is pale. It does not reflect. No idea if this is texture or material related..
So today, I fixed that:
This is a very poor cell-phone picture of the newly fluorescent level 5 sierpinski being held near a backlight.