Skylight fixture emulating natural exterior light

1. A skylight fixture, comprising:

a light fixture housing comprising an opening through which light exits the skylight fixture;

a first light engine disposed in the light fixture housing and comprising a first light source and a first optical assembly, wherein the first light engine is configured to emit non-directional light emulating a first aspect of natural exterior light through the opening;

a second light engine disposed in the light fixture housing and comprising a second light source and a second optical assembly, wherein the second light engine is configured to emit directional light emulating a second aspect of natural exterior light through the opening; and

a control module configured to drive the first light engine and the second light engine to provide a circadian stimulus and area illuminance at a user-controlled intensity level.

2. The skylight fixture of claim 1 , wherein the first aspect of natural exterior light comprises light associated with a sky.

3. The skylight fixture of claim 2 , wherein the second aspect of natural exterior light comprises light associated with direct sunlight.

4. The skylight fixture of claim 3 , wherein:

the first light engine is further configured to emulate a window to the sky; and

the second light engine is further configured to emulate sunlight passing through the window.

5. The skylight fixture of claim 1 , further comprising:

a sky-resembling assembly having a planar interior surface and comprising the first light engine;

a sun-resembling assembly having a planar interior surface and comprising the second light engine.

6. The skylight fixture of claim 5 , wherein:

the sky-resembling assembly is disposed on a bottom wall of the skylight fixture; and

the skylight fixture comprises a plurality of sun-resembling assemblies disposed on sidewalls of the skylight fixture defining a cavity.

7. The skylight fixture of claim 6 , wherein:

light from the first light source exits the planar interior surface of the sky-resembling assembly through an opening of the cavity opposite the bottom wall; and

light from the second light engine of each of the plurality of sun-resembling assemblies exits the planar interior surface.

8. The skylight fixture of claim 7 , wherein:

the first light engine is further configured to emulate a window portion of a traditional skylight; and

the second light engine is further configured to emulate sidewalls of the traditional skylight.

9. The skylight fixture of claim 1 , wherein the first light engine comprises a display panel configured to emulate an appearance of a sky.

10. The skylight fixture of claim 1 , wherein the first light engine provides a blue appearance and projects white light.

11. The skylight fixture of claim 1 , wherein the first light source comprises an array of LEDs arranged to at least one of back light, edge light, or side light the first optical assembly.

12. A skylight fixture, comprising:

a sky-resembling assembly comprising a sky-resembling optical assembly and a sky-specific light source wherein light from the sky-specific light source exits the sky-resembling optical assembly as skylight light;

a sun-resembling assembly adjacent the sky-resembling assembly, the sun-resembling assembly comprising a sun-resembling optical assembly and a sun-specific light source, wherein light from the sun-specific light source exits the sun-resembling optical assembly as sunlight light; and

at least one control module configured to, in a first mode, drive the sky-specific light source and the sun-specific light source such that the skylight fixture provides illumination with a circadian stimulus.

13. The skylight fixture of claim 12 , wherein:

the sky-resembling assembly defines a bottom wall of a cavity; and

the sun-resembling assembly defines a sidewall of the cavity.

14. The skylight fixture of claim 13 , wherein the sun-resembling assembly is disposed orthogonal to the sky-resembling assembly.

15. The skylight fixture of claim 13 , wherein the sun-resembling assembly forms an obtuse angle with the sky-resembling assembly.

16. The skylight fixture of claim 12 , wherein in the first mode the at least one control module is configured to drive the sky-specific light source and the sun-specific light source to provide a zonal luminance distribution of 35% or more in a region of 60-90 degrees of nadir.

17. The skylight fixture of claim 16 , wherein driving the sky-specific light source and the sun-specific light source comprises changing one of a brightness and a spectral content of the sky-specific light source and the sun-specific light source.

18. The skylight fixture of claim 12 , wherein the at least one control module is configured to, in a second mode, drive the sky-specific light source and the sun-specific light source such that the skylight fixture provides a circadian stimulus less than the first mode.

19. The skylight fixture of claim 18 , wherein in the second mode the at least one control module is configured to drive the sky-specific light source and the sun-specific light source to provide a zonal luminance distribution of less than 35% in a region of 60-90 degrees of nadir.

20. The skylight fixture of claim 19 , wherein driving the sky-specific light source and the sun-specific light source comprises changing one of a brightness and a spectral content of the sky-specific light source and the sun-specific light source.