The atrium is the key feature of the office tower and represents a ‘floating diamond”. Functional lighting for the lobby is achieved by side-mounted spotlights on the third floor. The lighting comprises three different systems of 4000K narrow–beam and widebeam metal halide spotlights as well as 3000K halogen spotlights used to highlight specific situations and scenarios. For the whole atrium, lighting at night creates a ‘magic’ atmosphere, highlighting the contrast between all the elements such as the bright triangular aluminum panels and the dark glass panels on the ceiling. During the nighttime artificial lighting scene, the ceiling pattern’s brightness levels are inverted from that of the daytime while preserving the same Gestalt quality.