The concept that is explored here is the idea of light being a barrier. Like a stoplight, there is not any physical barrier in stopping cars, yet people stop (due to some normative barrier imposed by law) due to the idea of it being a barrier. With a book shelves, usually there are verticals, that act as a barrier. Here, in this concept, it is replaced by light, different adjustable light both in terms of position and color. The concept attacks the theme of space with light.