water tight housing 20 the space in the expansion slot 45 allows for the ends of the heat sink 40 to move through the thermal expansion and through the movement reduce the width of the expansion slot 45 thus reducing outward pressure on the water tight housing 20 this in turn results in less potential for rupture or cracking occurring in the water tight housing 20 the heat sink 40 is thermally coupled to the led printed circuit board 60 which is thermally coupled to the at least one led 30 the whole arrangement is thermally coupled to the housing 20 and the lens 70 such that a thermal pathway is expediently provided for direct conductive transmission of heat from the pendant or accent light into the body of water as a heat dump in an exemplary embodiment a thermally transmissive compound is used to provide a thermal path for the heat through out the coupled components for instance a thermal past or potting compound special thermal pathway structures such as micro heat pipes can also be added to provide additional thermal transmission throughout the light the thermal path to the water surrounding the housing 20 allows for the use of higher power leds additionally although the instant invention provides improved thermal transmission a thermocouple limiter is provided in the electronics section 10 for instance on the printed circuit board with the controller to prevent thermal damage if for some reason temperatures exceed the maximum limits of the electrical components the light is assembled with the water tight fitting 50 coupled to a power source not shown and secured to one end of the watertight.