It is flat on the slab, but the sidw height is 52inches and that leaves only 4 ft of overhead space.
This sounds like an above ground pool your planning to use. It also sounds like you plan to build it on top of your basement floor, Do you know how much this pool is going to weigh when it's full....way more than your floor will support. I agree with everyone else about humidity and mold.....it WILL ruin your house.
But if you must do it why not just use indoor lamps plugged into gfi protected outlets placed at a safe distance from the pools edge. Then light the pool for user safety with a pentair aqualuminator light or smartpool nightlighter, Both are for use in above ground pools.