Light colour (#rrggbb); sodium-orange by default.
Procedural field (when no callback/texture is set): how much of the planet is settled, 0..1.
Show lights on the night side.
Radiance of a fully lit area.
Equirectangular resolution used to bake a lights callback, [width, height].
Feature size of the procedural field relative to the planet (larger = more, smaller regions).
Sun elevations (degrees, at the lit point) between which lights switch on.
Night-light settings. Plain JSON.