Point light sources?

Is there any sort of equivalent of a point light source in CesiumJS? Or any ability to allow objects themselves to cast light?

I’ve looked at the Lighting Sandcastle, and it (and the docs) seems to imply that the only way to modify the lighting of a scene is to set Scene.Light, which is either the Sun or a DirectionalLight (and not both at the same time — there can only be one Scene.Light). Is this right or am I missing something?