LED/Neopixel Numbers and Letters

Print the cases in whatever filament you like then print the lens in white. Adhere the LED strip to the insides of the models. Lay them on their back to print, you might need supports if you don't have bridging tuned. You can scale the letters in the X and Y directions, but keep the Z so your strip will fit. Then you can scale the the bases and end caps to match.  Once you have your letters/numbers printed, line them up and measure the total length. Use that measurement for the bases in your slicer. You can stretch the Middle Base in the X axis using your slicer. Then use glue and the dowel pin to connect them The endcaps all have an internal length of 100mm.

UPDATE- I redid the lenses and endcaps to have more clearance and I thickened the letters.