Print the Front and the Back part. There are no holes in the model, just add the holes via Bambu Studio. It depends on your light strip or if you want to use a barrel connector. U can also just use a drill.
Measure the length of the light strip.
Solder the wires and the barrel connector to the light strip (picture 1, 2 and 3)
Mount everything into the front part
Fore the back part I used normal aluminum foil with some double sided tape to reflect the light. See pictures
Close the box
Picture 1
Picture 2
Picture 3
Light without aluminum foil at the Back part, darker in the center
Light with aluminum foile in the Back part, light is more evenly
Add duoble sided tape to the back part
Cut the aluminum foil and tape it to the back part
Updated to 5 stars based on feedback
Printed a few times at different flow rates, ultimately i agree with @jnholeman and it needs to be a tad thicker. Otherwise a great model and my step dad really enjoyed it :) Recommend using clear tape behind to keep it together
Strength Issue:Design was great but the graphic fell out of the surround on the image file. We gave up after that happened and found a different option. Front is too thin, If you can modify the front to be 1-2 more layers I think it would be fine. No photos as it went into the trash.