An LED Diffuser designed to put the LED strip on a 45 degree angle and direct as much light toward the printer when used inside the IKEA Lack cabinet. The Prusa i3 MK3 is a 24v printer, so the LED strip used is 24v, but if you have a different voltage printer then you should use the proper LED strip.
I printed this in white PETG and am very happy with the outcome. I imagine you could print it in other colors for different effects.
Item used in this specific build:
LED Strip: https://www.amazon.com/gp/product/B00X5MDUD4
Note: I purchased the "Cool White" because I like a white light, but as of this posting they don't have that version available anymore.
Items shown in Images:
Screw Terminals : https://www.amazon.com/gp/product/B07CLY5N9T
The author hasn't provided the model origin yet.