Adjustable-Beam Lighting Fixture

1 . A light fixture comprising:

a base;

a light carrier pivotally mounted to the base for rotation about a longitudinal light carrier axis;

a light source carried by the light carrier; and

an optic carried by the light carrier;

wherein:

the light source comprises:

the light source comprises light emitting diodes; and

a circuit board carrying the light emitting diodes; and

the light source is mounted for adjustable spacing between the light source and the optic.

2 . The light fixture of claim 1 wherein the light carrier further comprises:

a detent mechanism detenting the rotation about the light carrier axis.

3 . The light fixture of claim 1 further comprising:

one or more springs biasing the light source in a first direction relative to the optic; and

an adjuster for shifting the light source against the bias to provide the adjustable spacing.

4 . The light fixture of claim 3 wherein:

the one or more springs comprise one or more coil springs along each side of the optic.

5 . The light fixture of claim 3 wherein the light source comprises:

a board carrier carrying the circuit board.

6 . The light fixture of claim 5 wherein the adjuster comprises:

a cam mounted for rotation about a cam axis and engageable with the board carrier via rotation about the cam axis to shift the light source against the bias to provide the adjustable spacing.

7 . The light fixture of claim 6 wherein the cam has a detented engagement with the board carrier.

8 . The light fixture of claim 7 wherein the cam has a plurality of discrete surface portions providing the adjustable spacing as a discretely adjustable spacing.

9 . The light fixture of claim 7 wherein the cam comprises a metallic extrusion having a plurality of lobes.

10 . The light fixture of claim 7 wherein a screw is threaded into the cam and passes through an endplate of a housing of the light carrier.

11 . The light fixture of claim 10 wherein the screw is drivable to rotate the cam about the cam axis.

12 . The light fixture of claim 5 wherein the light source comprises a plurality of said circuit boards carried by a single said board carrier; and

on each said circuit board, the light emitting diodes are in a linear array.

13 . (canceled)

14 . The light fixture of claim 1 wherein:

at opposite longitudinal ends, the light carrier is mounted to the base for the rotation about the light carrier axis.

15 . The light fixture of claim 1 further comprising:

a detent mechanism detenting the rotation about the light carrier axis and comprising extruded scallop features in a housing of the light carrier interacting with a detenting member.

16 . The light fixture of claim 15 wherein:

the detenting member is self-sprung and formed as a molding or an extrusion.

17 . The light fixture of claim 1 further comprising:

a driver carried within the base.

18 . The light fixture of claim 1 wherein:

the optic comprises a molded or extruded member having a central portion for passing light from the light source and a pair of lateral mounting flanges.

19 . A method for using the system of claim 1 , the method comprising:

rotating a cam mounted about a cam axis shift the light source against a bias to adjust the adjustable spacing.

20 . The method of claim 19 wherein:

the rotating includes a detented cooperation of the cam and a carrier of the light source.

21 . The method of claim 19 further comprising:

a detented rotating of the light carrier relative to the base.

22 . The light fixture of claim 5 wherein:

the light source comprises a plurality of said circuit boards; and

each said board carrier caries an end-to-end assembly of said circuit boards