The Lighting window not only controls illumination in the scene, but also materials and textures, scene fog, background images, and gamma correction. It also provides controls to save and load lighting and shading Presets independently of fractal formulas.
The Lighting window is launched from its button in the Side Panel of the Main Window. It can be docked or un-docked from the Main window with a right-click context menu. Right-click the Lighting button and choose and option to stick or unstick the Lighting window to the Main window.