We reworked our Light Editor. It is now decoupled and has a full object-based Python API. More info can be found in the Python v2 documentation. Additionally, the Light Editor has an improved search field with a filter for the different light types. Also, editing values on multiple selections is now possible. So you can, for example, select multiple lights and edit the color or intensity for all selected lights in one go. With Ghost lights, you can now zoom and pan for better adjusting lens flare effects that are very close together. These improvements will make light set up more efficient.
This feature ignores the spectrum of the rays and only uses the light spectrum for all rays, when enabled.
We added the Use Light Spectrum option to the Ray File section of the Light Editor.