Currently, the lighting in 3D View is global. This is problematic, as different lighting is usually needed for different tasks.

For example, the viewport lighting used for sculpting is usually vastly different than that used for modeling or animation. The way viewport lighting is saved now, despite having a 'Sculpting' Screen set up, you still have to manually adjust the lighting each time you wish to sculpt.

Storing this setting in a different place would be helpful, rather than needing to modify the preferences each time one changes tasks.