The sketch is based on reflections on the source of lighting in its classical understanding and form. Everything new is well-forgotten old. The project is a reinterpretation of the shape of the Edison light bulb-a game with a shape that grows into an exposition. At the same time, the exposition is designed to draw attention to energy savings. By cutting off a part of the lamp physically, we symbolically show that we save resources. There is a laser beam in the exposition.