Created by Rainer Kohlberger and Wilm Thoben (praxis berlin), White Light / White Heat (2011) is a piece for the site specific installation ’shift’ shown at the 22PRESENTS showroom in Prague. A strong laserbeam is deflected by two mirrors oscillating at very high speeds. The human eye perceives a stable image as long as they move fast enough. White Light / White Heat operates at the threshold of this rate. A constant modulation is introduced, flicker and envelopes modulate basic geometric shapes and waveforms.