[jimbo2012]

I've this before I really don't think you will feed conduit under a slab.

U need to cut a 3-4 inch wide trench and lay the conduit in.

So U make two cuts chisel out the 3-4", now if there is one in the floor already U can just cut from the existing one to the new location, lamps draw little juice.

Butr if there R none U need to go up a wall into the attic to the panel.