LED light fixture

1. An LED light fixture comprising:

a single-piece extrusion extending between first and second ends and including (i) a substantially planar base having an LED-adjacent surface and an opposite surface and (ii) a heat-dissipating section having heat-dissipating surfaces extending from the opposite surface and being open to water/air flow thereover, the base having at least one venting aperture therethrough and distal from the first and second ends of the extrusion to provide cool-air ingress to and along the heat-dissipating surfaces by upward flow of heated air therefrom;

a housing secured with respect to the single-piece extrusion; and

an LED arrangement mounted with respect to the LED-adjacent surface in non-water/air-tight condition with respect to the housing.

2. The LED light fixture of claim 1 wherein the venting aperture includes at least one elongate aperture across at least a majority of the width of the base.

3. The LED light fixture of claim 2 further including a deflector member secured to the base along the elongate aperture.

4. The LED light fixture of claim 3 wherein the deflector member has at least one beveled deflector surface oriented to direct and accelerate air flow along the heat-dissipating surfaces.

5. The LED light fixture of claim 4 wherein the deflector member includes a pair of oppositely-facing beveled deflector surfaces oriented to direct and accelerate air flow in opposite directions along the heat-dissipating surfaces.

6. The LED light fixture of claim 1 wherein:

the plurality of LED-array modules includes LED-array modules in lengthwise relationship to one another; and

the at least one venting aperture includes at least one aperture distal from the first and second ends of the extrusion.

7. The LED light fixture of claim 6 wherein:

the plurality of LED-array modules includes at least one proximal LED-array module proximal to a first end of the extrusion and at least one distal LED-array module distal from the first end of the extrusion;

the distal LED-array module(s) are spaced from the proximal LED-array module(s); and

the venting aperture(s) distal from the first and second ends of the extrusion are at the space between the proximal and distal LED-array modules.

8. The LED light fixture of claim 1 wherein the housing includes at least one end-portion secured with respect to the single-piece extrusion and forming at least one venting gap therebetween to provide cool-air ingress to and along the heat-dissipating surfaces by upward flow of heated air therefrom.

9. The LED light fixture of claim 8 wherein the at least one end-portion includes a first end-portion which forms a water/air-tight chamber enclosing at least one electronic LED driver.

10. The LED light fixture of claim 8 wherein:

the at least one end-portion includes first and second end-portions secured with respect to first and second ends, respectively, of the single-piece extrusion; and

the at least one venting gap includes a venting gap between each end-portion and the single-piece extrusion.

11. The LED light fixture of claim 10 wherein:

the first end-portion forms a water/air-tight chamber; and

the second end-portion forms an endcap.

12. An LED light fixture comprising:

a heat sink extending between first and second ends and including (i) a substantially planar base having an LED-adjacent surface and an opposite surface and (ii) a heat-dissipating section having heat-dissipating surfaces extending from the opposite surface and being open to water/air flow thereover, the base having at least one venting aperture therethrough and distal from the first and second ends of the heat sink to provide cool-air ingress to and along the heat-dissipating surfaces by upward flow of heated air therefrom; and

an LED arrangement mounted with respect to the LED-adjacent surface.

13. The LED light fixture of claim 12 wherein the venting aperture includes at least one elongate aperture across at least a majority of the width of the base.

14. The LED light fixture of claim 13 further including a deflector member secured to the base along the elongate aperture.

15. The LED light fixture of claim 14 wherein the deflector member has at least one beveled deflector surface oriented to direct and accelerate air flow along the heat-dissipating surfaces.

16. The LED light fixture of claim 15 wherein the deflector member includes a pair of oppositely-facing beveled deflector surfaces oriented to direct and accelerate air flow in opposite directions along the heat-dissipating surfaces.

17. The LED light fixture of claim 12 wherein:

the plurality of LED-array modules includes LED-array modules in lengthwise relationship to one another; and

the at least one venting aperture includes at least one aperture distal from the first and second ends of the heat sink.

18. The LED light fixture of claim 17 wherein:

the plurality of LED-array modules includes at least one proximal LED-array module proximal to a first end of the heat sink and at least one distal LED-array module distal from the first end of the heat sink;

the distal LED-array module(s) are spaced from the proximal LED-array module(s); and

the venting aperture(s) distal from the first and second ends of the heat sink are at the space between the proximal and distal LED-array modules.

19. The LED light fixture of claim 12 further including a housing which has at least one end-portion secured with respect to the heat sink and forms at least one venting gap therebetween to provide cool-air ingress to and along the heat-dissipating surfaces by upward flow of heated air therefrom.

20. The LED light fixture of claim 19 wherein the at least one end-portion includes a first end-portion which forms a water/air-tight chamber enclosing at least one electronic LED driver.

21. The LED light fixture of claim 19 wherein:

the at least one end-portion includes first and second end-portions secured with respect to first and second ends, respectively, of the heat sink; and

the at least one venting gap includes a venting gap between each end-portion and the heat sink.

22. The LED light fixture of claim 21 wherein:

the first end-portion forms a water/air-tight chamber; and

the second end-portion forms an endcap.

23. An LED light fixture comprising:

a heat sink extending between first and second ends and including (i) a substantially planar base having an LED-adjacent surface and an opposite surface and (ii) a heat-dissipating section having heat-dissipating surfaces extending from the opposite surface and being open to water/air flow thereover, the base having at least one venting aperture therethrough to provide cool-air ingress to and along the heat-dissipating surfaces by upward flow of heated air therefrom; and

an LED arrangement mounted with respect to the LED-adjacent surface.

24. The LED light fixture of claim 23 wherein the venting aperture includes at least one elongate aperture across at least a majority of the width of the base.

25. The LED light fixture of claim 23 further including a housing which has at least one end-portion secured with respect to the heat sink and forms at least one venting gap therebetween to provide cool-air ingress to and along the heat-dissipating surfaces by upward flow of heated air therefrom.

26. The LED light fixture of claim 25 wherein the at least one end-portion includes a first end-portion which forms a water/air-tight chamber enclosing at least one electronic LED driver.

27. The LED light fixture of claim 25 wherein:

the at least one end-portion includes first and second end-portions secured with respect to first and second ends, respectively, of the heat sink; and

the at least one venting gap includes a venting gap between each end-portion and the heat sink.