I posted a similar idea: ceiling tiles, sized like walkways but with a completely flat top, so they can be snapped under foundations on multifloor builds or used on their own. Coming in ramps and 2 types of flat: power connector (1 cable limit) and light fixture. All would have internal wiring, so adjacent panels have power connection. I imagine these using encased beam and cable as construction materials. These would also need a diagonal wall for closing ramp sections and powered wall could integrate nicely, as well