I created this part to fixate an LED stripe used in the Pusa enclosure.
(28 mm x 8 mm x 4 mm)
it is supposed to support 10 mm LED stripes 

The LED stripe is usually glued to a surface, but I did not trust it :-)

Two screws will hold it in place. It is not very robust but it does the trick (for me at least).

I have printed it using Prusa PLA without support.