The model of a light source able to give the space characteristics of a photon directly in the observation reality, without instrumentation, has already been thought of and then refuted due to its complexity to realize. In this study, we see that a specific source allows its validation. This source of almost spherical shape and made of vertical bands diffusing its brightness in a room, we observe in a box equipped with a vertical slit bright and dark vertical fringes; and seeing that these fringes remain vertical when the position of the source is modified, we deduce the presence of a light and shadow field...