A spa is provided that includes: a basin; a motor having a shaft defining a rotation axis; a hub mounted to the shaft, the hub having North and South pole domains spaced apart from each other and arranged to encircle the rotation axis in alternating relation; and an impeller which is disposed in the basin in axially spaced relation to the hub and is at least substantially constrained against movement but for rotation about the axis, the impeller including a rotor body of a non-magnetic, electrically-conductive material having relatively low magnetic permeability. The improvement in which is that there are lights and coils coupled to the impeller for rotation therewith, the lights and coils being coupled and adapted such that, in use, the rotating magnetic fields associated with the drive hub created induced currents in the coils which actuate the lights and create a net force that rotates the impeller.