My daughter wanted a printed letter with a LED in it.
That was of course no letter but a whole project 
Complete Alphabet is here:
https://www.prusaprinters.org/prints/109865-glowing-wled-or-led-all-alphabet-letters-and-all-n
Hi and welcome to the forum , It is for sure an interesting print and looks very nice indeed .
Just a question . in the prusa site shopping list it is ws2812b and I assume that is what you have used but in the short video you linked each letter is on sold color ? Can you show more effects for each letter. edit : I seen the videos in the other links , it looks great
I could not find how embed youtube videos in the description. I could not find a manual “how to”.
That is the reason that there is only one link to a Youtube video.
A new user may only place two links 