i tried this a couple times. to much light bleed. the only right way to do it is silk screen printing, from what i looked up about it.

 

i have some friends that can do that i might look into it, on a thick plastic?

there is alot of bleed through so you can see the graphics at night there has to be bleed through but then you see the plastics behind i think during the night just the numbers shoudl be lit up or maybe leds on the the outside pointing at it to see it i dunno