LED light fixture

1. An LED light fixture comprising:

a housing portion forming a chamber enclosing at least one driver; and

a base extending from the housing portion and supporting at least one LED illuminator outside the chamber, the housing portion and the base defining an open space therebetween permitting air/water-flow therethrough.

2. The LED light fixture of claim 1 wherein the housing portion and the base are each formed as part of a one piece comprising at least one frame member supporting the base with respect to the housing portion and including forward and rearward regions.

3. The LED light fixture of claim 2 wherein:

the rearward region includes the chamber and a rearmost portion adapted for securement to a support member; and

the base is within the forward region defining the open space along at least three sides of the base.

4. The light fixture of claim 2 wherein:

the at least one LED illuminator is in thermal contact with an illuminator-supporting region of the base, the at least one LED illuminator comprising an optical member disposed over at least one LED emitter and configured for directing emitter light predominantly forward; and

a rearward shield member extends downwardly at the rearward side of the base, the rearward shield member extending lower than a lowermost outer-surface portion of the optical member to block rearward illumination therefrom.

5. The light fixture of claim 1 wherein the base is a separate structure secured with respect to the housing.

6. The light fixture of claim 5 wherein the base comprises a pair of extruded side portions each forming a channel along the base, the side portions and the base being of a single-piece extrusion secured with respect to the housing.

7. The light fixture of claim 5 wherein:

the base is a single-piece extrusion having an illuminator-supporting region; and

the at least one LED illuminator comprises a plurality of LED modules in thermal contact with the illuminator-supporting region of the single-piece extrusion.

8. The LED light fixture of claim 7 wherein:

the LED-array modules are substantially rectangular having predetermined module-lengths; and

the illuminator-supporting region has a length which is selected from one module-length and a multiple thereof.

9. The LED light fixture of claim 8 wherein at least one of the plurality of modules has a module-length different than the module-length of at least another of the plurality of modules.

10. The light fixture of claim 5 wherein the base comprises a plurality of extruded heat sinks.

11. The light fixture of claim 10 wherein the at least one LED illuminator comprises a plurality of LED modules each in thermal contact with a respective one of the extruded heat sinks.

12. The light fixture of claim 11 wherein each heat sink supports one of the LED modules.

13. The light fixture of claim 5 wherein the open space is along at least three sides of the base.

14. The light fixture of claim 13 wherein the base comprises a plurality of extruded heat sinks.

15. The light fixture of claim 14 wherein the at least one LED illuminator comprises a plurality of LED modules each in thermal contact with a respective one of the extruded heat sinks.

16. The light fixture of claim 1 comprising at least one wall extending within the open space and open for air/water-flow along at least two sides thereof.

17. The LED lighting fixture of claim 16 wherein the at least one wall extends within the open space substantially along the base.

18. The LED lighting fixture of claim 17 wherein the at least one wall divides the open space into an illuminator-adjacent flow region and a chamber-adjacent flow region.