Markus Reisinger is a lighting researcher and educator. As a qualified architect, he practiced lighting design internationally, working on concepts for architecture and scenic art. Many of his project solutions explore creatively new technologies to their best and sketch future strategies for lighting applications. While engaged with LED lighting for many years he examined critically the consequences of the technology advances for architectural applications and luminaire design. His academic interests focus on perceptual aspects of lighting and emotional responses to lighting situations. He is a passionate lecturer with an approach that equally builds on profound technical knowledge as on a thorough understanding of the perceptual, behavioral and psychological effects of light.
Communicate with Graphics from IES TM-30-15
TM-30-15 describes a calculation method to evaluate color rendition properties of light sources. The outcomes are summarized as fidelity index, gamut index and additional graphics and indices. Especially for communication and design purposes it is useful if metrics use a test set of samples with equally distributed hues. The 99 samples used in the TM-30-15 is such a set, another is the set of 215 samples selected by Opstelten. For both are graphical representations available that illustrate hue shifts and changes in chroma. These graphics clearly go beyond what indices (e.g. chroma change by hue indices and the hue fidelity indices) can tell. How strongly color shifts can impact human behavior illustrate examples of food or cosmetics. For fruits the color appearance tell us about the ripeness, are meat products illuminated with unsuited light than appearance of the color quickly shifts. This is in both cases systematically evaluated. For design are critical decisions if color combinations work under a specific or a range of lighting conditions. In all this cases graphic representations are very helpful to communicate about changed appearance. To know and quantify the appearance shifts opens opportunities for interpretations why something is more attractive, natural or suitable. Hence being able to verbalize and formulate color quality aspects helps to reach desired effects more precisely. A reality of today is that LED light sources come in an enormous variety and decisions what suits an application best is not getting easier. The power of the graphics that TM-30-15 procedure provides is examined from viewpoint of a person in practice. The conclusions additional point out a path how the concept of unique hues can be applied to further strengthen clearness and precision of the communication. Finally the approach to use graphics should especially invite design disciplines to familiarize them with new opportunities that new color quality indicators provide.