Underwater LED light
View Patent ↗An underwater light, e.g., for a pool or spa, includes an ordinarily watertight housing, an outer compartment within the housing and floodable by water flowing therein in the event the housing is no longer watertight, a current shield within the outer compartment and at least partially defining an inner compartment within the outer compartment, a light emitter within the inner compartment, a passageway communicating between the inner and outer compartments such that outer compartment flood water can enter the inner compartment and contact the light emitter, and a conductor. The conductor is positioned so as to collect stray electrical current conducted from the inner compartment by water within the passageway, thereby reducing the risk of shock presented by such stray electrical current. The underwater light is installable within a wet niche, and includes a transformer housed in a separate compartment that extends into the wet niche for thorough cooling thereof.
1. An underwater light, comprising an ordinarily watertight housing; an outer compartment within said housing, said outer compartment being subject to flooding by water flowing therein from outside said housing in the event said housing is no longer watertight; a current shield disposed within said outer compartment, said current shield at least partially defining an inner compartment within said outer compartment; a light emitter disposed within said inner compartment; a passageway communicating between said inner compartment and said outer compartment such that at least a portion of any water flooding said outer compartment can enter said inner compartment and come into contact with said light emitter; and a conductor positioned so as to collect any and substantially all stray electrical current that may be conducted from said inner compartment by water within said passageway, thereby reducing the risk of electrical shock presented by such stray electrical current.
2. The underwater light of claim 1 , wherein said conductor includes an electrically conductive surface which at least partially defines said passageway.
3. The underwater light of claim 2 , wherein said current shield includes an electrically insulative surface which at least partially defines said passageway, said electrically insulative surface being disposed opposite said electrically conductive surface so as to cause any and all stray electrical current that may be conducted from said inner compartment by water within said passageway to pass along and in close proximity to said electrically conductive surface, thereby facilitating the collection of such stray electrical current by said conductor.
4. The underwater light of claim 3 , wherein said current shield is dome-like in shape and includes a lower peripheral edge which includes said electrically insulative surface.
5. The underwater light of claim 3 , wherein at least a portion of said electrically insulative surface is in physical contact with said electrically conductive surface.
6. The underwater light of claim 3 , wherein said electrically insulative surface and said electrically conductive surface are separated by a gap.
7. The underwater light of claim 6 , wherein said gap is not more than about 0.1 inches.
8. The underwater light of claim 6 , wherein said gap is not more than about 0.02 inches.
9. The underwater light of claim 4 , wherein said lower peripheral edge of said current shield has a width of not less than about 0.04 inches.
10. The underwater light of claim 4 , wherein said lower peripheral edge of said current shield has a width in a range from about 0.05 inches to about 0.07 inches.
11. The underwater light of claim 2 , wherein said conductor is adapted for connection to an electrical ground.
12. The underwater light of claim 2 , wherein said conductor includes a metal plate, and said conductive surface is a portion of said metal plate.
13. The underwater light of claim 12 , wherein said light emitter is mounted to said metal plate.
14. The underwater light of claim 1 , wherein said light emitter includes an array of light emitting diodes.
15. The underwater light of claim 1 , wherein said housing includes a lens which defines at least a portion of said outer compartment.
16. The underwater light of claim 15 , wherein said lens is made from glass.
17. The underwater light of claim 15 , wherein said current shield is made from translucent plastic and is disposed between said lens and said light emitter.
18. The underwater light of claim 15 , wherein said current shield is made from transparent plastic.
19. The underwater light of claim 1 , further comprising a transformer compartment spaced apart from said inner and outer compartments by a distance sufficiently long so as to permit a free flow of water in a space between said transformer compartment and said inner and outer compartments for efficient removal of heat therefrom.
20. An assembly comprising the underwater light of claim 19 installed within a wet niche of standard size for a below-ground spa installation.