Diffusor for solar gutter light

A light diffusor for some gutter-mounted solar LED lights... exactly like these:

https://smile.amazon.com/gp/product/B07881ZY97/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I needed to spread the light out to make some cool solar lithophanes https://youtu.be/eUVajGwVoas

The trick to printing this as a single thin, light-transmissive layer is to set your layer width to 1.5 times the nozzle diameter - so .6mm on a .4mm printer.

Layer height, I used .3 - and that worked out really nicely. Also, I did print with a small brim, which was cut away to fit.