An induction luminaire system for use in high-moisture environments includes a transmitter coupling structure housing an induction transmitter having a first planar coil. The transmitter coupling structure is received with a wall fitting or a lighting niche. An induction receiver has a second planar coil to receive an induction signal from the first planar coil, wherein the induction receiver is in electrical communication with the light module, and wherein the induction receiver provides power from the received induction signal to a light module. A receiver coupling structure houses the induction receiver. The first planar coil of the induction transmitter is positioned substantially parallel and co-axial with the second planar coil of the induction receiver, and both the first and second planar coils are positioned at least partially within the interior of the underwater wall fitting or the interior of the underwater lighting niche.