Single-piece end cap

1. A single-piece end cap, comprising:

a plate;

a perimeter wall extending around a perimeter of the plate; and

structural tabs that protrude out from the plate, wherein the structural tabs are used to attach the single-piece end cap to an extrusion frame and wherein the structural tabs include one or more holes that are used to securely attach the single-piece end cap to the extrusion frame.

2. The single-piece end cap of claim 1 , further comprising a gasket retainer structure to retain a gasket attached to the single-piece end cap.

3. The single-piece end cap of claim 1 , further comprising a recessed area to receive the extrusion frame.

4. The single-piece end cap of claim 3 , wherein the recessed area is formed between one structural tab of the structural tabs and the perimeter wall.

5. The single-piece end cap of claim 3 , further comprising a second recessed area to receive a second extrusion frame.

6. The single-piece end cap of claim 1 , wherein one or more of the structural tabs include one or more structural ribs that provide a stable attachment between the single-piece end cap and the extrusion frame.

7. A lighting fixture, comprising:

a first end cap;

a second end cap;

a first extrusion frame; and

a second extrusion frame, wherein the first end cap is attached to the first extrusion frame and to the second extrusion frame at a first end of the lighting fixture, wherein the second end cap is attached to the first extrusion frame and to the second extrusion frame at a second end of the lighting fixture, wherein the first end cap and the second end cap each comprise:

a plate;

structural tabs protruding out from the plate, wherein the structural tabs are inserted into respective channels of the first extrusion frame and the second extrusion frame and wherein the first extrusion frame and the second extrusion frame are securely attached to the first end cap and the second end cap by fasteners that extend through first holes in the structural tabs of the first end cap and the second end cap and respective second holes in the first extrusion frame and the second extrusion frame.

8. The lighting fixture of claim 7 , further comprising a lens extending between the first end cap and the second end cap and attached to the first extrusion frame and the second extrusion frame.

9. The lighting fixture of claim 7 , wherein the first end cap and the second end cap each comprise recessed areas to receive the first extrusion frame and the second extrusion frame.

10. The lighting fixture of claim 7 , wherein one or more of the structural tabs of the first end cap and the second end cap include a respective structural rib that provides a stable attachment between each of the first end cap and the second end cap and each of the first extrusion frame and the second extrusion frame.

11. The lighting fixture of claim 7 , wherein the first end cap comprises a first gasket retainer structure to retain a first gasket attached to the first end cap and the second end cap comprises a second gasket retainer structure to retain a second gasket attached to the second end cap.

12. The lighting fixture of claim 7 , wherein the first extrusion frame and the second extrusion frame each includes a threading channel for vertical attachment of a driver or a ballast using screws.

13. The lighting fixture of claim 7 , wherein the first end cap and the second end cap each comprise one or more knockout sections formed in the plate, wherein the one or more knockout sections are removable to form one or more holes in the plate.

14. A multi-unit lighting fixture, comprising:

a first lighting fixture; and

a second lighting fixture, wherein the first lighting fixture and the second lighting fixture each includes:

an end cap;

a first extrusion frame; and

a second extrusion frame, wherein the first extrusion frame and the second extrusion frame are attached to the end cap, wherein the end cap of the first lighting fixture is attached to the end cap of the second lighting fixture, and wherein the end cap of the first lighting fixture is attached to the end cap of the second lighting fixture by fasteners that extend through respective holes in a plate of the end cap of the first lighting fixture and in a plate of the end cap of the second lighting fixture.

15. The lighting fixture of claim 14 , wherein the end cap of the first lighting fixture and the end cap of the second lighting fixture each comprise structural tabs, wherein the structural tabs are inserted into respective channels of the first extrusion frame and the second extrusion frame.

16. The lighting fixture of claim 15 , wherein the first extrusion frame and the second extrusion frame of the first lighting fixture are securely attached to the end cap of the first lighting fixture by fasteners that extend through holes in the structural tabs of the end cap of the first lighting fixture and respective holes in the first extrusion frame and the second extrusion frame of the first lighting fixture.

17. The lighting fixture of claim 14 , wherein the end cap of the first lighting fixture comprises one or more first knockout sections formed in the plate of the end cap of the first lighting fixture, and wherein the end cap of the second lighting fixture comprises one or more second knockout sections formed in the plate of the end cap of the second lighting fixture.

18. A single-piece end cap, comprising:

a plate;

a perimeter wall extending around a perimeter of the plate;

structural tabs that protrude out from the plate, wherein the structural tabs are used to attach the single-piece end cap to an extrusion frame; and

one or more knockout sections formed in the plate, wherein the one or more knockout sections are removable to form one or more holes in the plate.

19. The single-piece end cap of claim 18 , further comprising a gasket retainer structure to retain a gasket attached to the single-piece end cap.

20. The single-piece end cap of claim 18 , further comprising a recessed area to receive the extrusion frame, wherein the recessed area is formed between one structural tab of the structural tabs and the perimeter wall.