Quoted from John_I:
On the other hand you're implying that this all gets integrated into a pinball machine for nearly free and that is not the case. True custom integration or choreography of the lighting takes some know how as opposed to the mindless Pinstadium systems that use the same Chinese cell phone app.
The controller and the program to direct the digital leds are allready in the game, so that´s a non-issue.
I would be utterly surprised if the bom for thoose lights are above 10$.
Working with led-lighting you fairly soon realize the biggest cost is copper wiring.
That is, atleast if you are not working with ultra advanced top end quality clay pakys and such, which i´m fairly certain stern is not.