Asset idea: usdlux lights

[AlexSchwank]

Have a set of test assets to show the behavior/look of lights in different applications and renderers.

[pablode]

Perhaps we can bring over Anders' test assets once the UsdLux changes have been finalized: https://github.com/anderslanglands/light_comparison

[hybridherbst]

For future reference, I recently made glTF test assets for spot, point, and directional lights:
fh-LightRigs.zip

PointLightRig:

SpotLightRig:

If someone knows how to faithfully convert GLB files with lighting to USD I'm all ears :)