In the work group „Light Case“ (2014) Stefan Alber examines the perception of light and color on different surfaces. He uses optical components as well as materials from photographic image production. Each work consists of three screens, installed inside aluminum frames with hinged door elements. Depending on the angle of the opened door, the viewer is given more or less insight. Each frame contains a color-intensive photographic background, of the kind often seen in commercial and product photography. Mirrors on the inside of each door add the reflection of the surroundings to the visual impression. The monochrome appearing exteriors of the hinged doors are covered with photosensitive paper, which changes slowly but continuously in the surrounding light. In his installation, Stefan Alber combines elements of temporal as well as spatial processes, scrutinising antagonisms such as flexibility and statics, process and perfection.