For my Wordclock project I needed a LED strip holder that holds the LED strip with the LED downward facing.
As I have only found LED strip holders that hold LED strips from the back side I designed my own.
This LED strip holder served me for my text clock project and holds all the LED strips in place. It is designed for 144 LED/m LED strips. It consists of a LED strip holder and a bracket to keep the strip in place. The tooth pattern on the side can be used to align several LED strips side by side - see pictures.
Have fun printing this!