Underwater LED Lights

An LED light for underwater use comprising:

• an LED light assembly having a heat sink thermally accessible from the periphery of the assembly;
• a clamp coupled around the heat sink to conduct heat from the heat sink;
• a plate coupled to the clamp to conduct heat from the clamp;
• a housing having an open top and an outward extending flange at the open top thereof;
• the LED light assembly and clamp being positioned in the housing with the plate fastened to the flange at the top of the housing and extending outward beyond most of the flange;
• and
• a lens;
• at least one lens clamp holding the lens with respect to the plate;
• the lens, plate and flange assembly being sealed, whereby any other openings in the housing may be sealed to provide the LED light for underwater use.

An LED light for underwater use comprising;

• a housing;
• an LED cluster within the housing;
• the LED cluster being mounted on and in close thermal contact with a heat conductor;
• the heat conductor being in close thermal contact with a first surface of a wall having water on a second surface of the wall opposite the first surface;
• whereby when the housing is sealed and the LED light is operated under water, the majority of the cooling of the LED cluster is by conduction of the heat generated by the LED cluster to the inside surface of the housing and not by convection or radiation of heat to the inside surface of the housing.