The exhibition is conceived as a vast experience that allows to immerse the visitor in a survey on light and more particularly on its use in the field of lighting. In the course of history, we used the candle and then the incandescent lamp to enlighten us. Today, the lighting technologies are numerous and we may find ourselves deprived of the choice that is offered to us in store: halogen lamp, neon tube, fluorescent-compact bulb, white LED bulb hot or cold, etc. In addition to their primary function, these technologies must address current environmental challenges in terms of life expectancy, energy consumption or resource availability. Demonstrations, manipulations, meeting with researchers to know everything about LED devices.