Rehabilitation points. I... haven't managed to acquire a significant amount to trade in my expended spheres to get infused ones.. [Tucking her hands under the table for a moment, she retrieves a glass sphere with a small piece of cut emerald suspended in it.] We set these out during a highstorm to be infused with Stormlight, but there are no highstorms here.
I'm not sure the dome would survive one, were it not underwater.