Deep Infinity Mirror - about 2cm on each side of the led strip
Print with a 0.4mm nozzle and 0.12 layer height.
Shallow mirror: https://makerworld.com/en/models/206557
Controller: https://makerworld.com/en/models/206526
Collection: https://makerworld.com/en/u/3551674117/collections/691762
Tutorial: