Sphere light with Shaping API and cone angle

Hi experts,

I find that cone angle in Shaping API has no effect on sphere light in usdview. Is it as design or a bug of usdview?

On the other hand, when a sphere light has cone angle, will it work as a spotlight? and will it have

Here is the model I tested:
allLightsInOneScene1.usda (49.0 KB)