Use min 50% infill or light are gonna light through wall

I use lights with usb cable for best effect like it's glowing obviously, just round about walls and you are done

Maybe you can use lighter and do little burn marks for effect but i didn't try that

Lights i buyed i cannot find on internet but it's similar like these ones:

[https://www.t-led.cz/p/rgb-led-pasek-300smd-vnitrni-8210?gad_source=1&gclid=Cj0KCQiAtaOtBhCwARIsAN_x-3JioQbMoZDeoOe378cZXhKWAgzs8dGQPbPN8PwgYQvmMnRKxTKaKs4aAk8sEALw_wcB](https://www.t-led.cz/p/rgb-led-pasek-300smd-vnitrni-8210?gad_source=1&gclid=Cj0KCQiAtaOtBhCwARIsAN_x-3JioQbMoZDeoOe378cZXhKWAgzs8dGQPbPN8PwgYQvmMnRKxTKaKs4aAk8sEALw_wcB)