Great option for people who can´t print multicolor. 
Its a model of 3 parts. 
bottom- where you stick the led lights
middle- where you can use colorful filaments (I used meta red )
top- th silhouette (best to print black)

The bottom should be at least 23mm high
middle 1mm
top 1-2mm

You stick the led lights to the space in the bottom part, then you glue the middle with the top part and after that you glue all three parts together. 
I know it is not a regular style how to model a lightbox, but it works even on a “not so good” printer. 
Hope you like it!