In the pavilion nine bunches of light bulbs are hanging down, all of them fed by a box with electronics and a sensor sensitive to fluctuating air pressure. (In other words, sound with an extremely low frequency that cannot be heard by the human ear, though which is present everywhere.) The intensity of the light bulbs is synchronised with the air pressure. Depending on the weather conditions and the activity on the Hereplein, the light in the pavilion changes from peaceful, soft, vibrating, orange, to a violent, flickering light. The main fluctuations of air pressure come from the wind pressing on the glass, and whirling around the corners of the pavilion. Apart from that, low frequencies of sound come from traffic and other human activity. All fluctuations are translated into light and, in this way, they become visible to the audience. The glass walls of the pavilion were cladded on the inside with a yoghurt mixture, to make the transparant glass matt. With Air Light the pavilion adopts the features of a lantern, that glimmers as soon as a bus approaches, and dims as it has gone.