Summary

Here is how you can make a cool looking LED light sign,
just look on the pictures you get the idea
This design is specialy made for FDM single extruder,
you need to manually change filament during printing at correct layer height,
also remember to add tollerance gab so parts will fit.
LED are 12V but I only give them 9V, else they get too bright and too hot,
the reason for putting so many LED in here, is to get uniform light.
PRINT INSTRUCTIONS: infill is 0 else you get visible lines
use bottom, top, wall layer numbers to adjust how it is printed,
do not use transparent filament, it will make the LED light hot spots clearly visible,
normal white is best, it will diffuse the light.