I used 10 cm long LED strip. My Plexiglas dimensions are 137x3 mm. But i added top grass without holes so you can easily create hole as big as you want in prusaslicer. The 3D printed switches work surprisingly well. You will need a bit of super glue to put them together (approximately 5-10 min).

The rest is press fit so there should be no need to glue everything together.

Only the 4 switch parts, switch, switch_case, peg and back_support are printed in 0.15 mm layer heights, others are in 0.2.