Edited and text by Jan Aman, Nathalie Erginot, "One Day One Day" is two books in one and can be read from both sides. It was two exhibitions, two large installations shown in daily rotation. One day Light Wall was shown, and the next day Phi Wall was on display. Two invitation cards were sent out and two openings took place. Two press information kits and two websites (each describing one work) were released. As both works, albeit of quite different appearance, are based on phenomena resulting from exposure to certain frequencies of blinking lights, the discussions around the shows may have taken place in awareness, in unawareness, or in a state of uncertainty about the double nature of "One Day One Day".