Advances in Characterizing Color Rendition of Light Sources

March 21, 2021

Advances in Characterizing Color Rendition of Light Sources

Light source spectrum is one component of lighting quality. Among other attributes, spectrum influences the color appearance of objects, rendering objects with more or less saturation, shifting their hue, and/or increasing or decreasing their lightness. The pattern and regularity of these varying shifts can be predicted, which is important because the color shifts can be desirable or undesirable depending on the circumstance. This webinar, hosted by the OSA Color Technical Group, will begin with a description of the theoretical and practical considerations that are important when characterizing how light sources render object colors.

Our presenters, Kevin Houser of Oregon State University and Michael Royer of Pacific Northwest National Laboratory, will then describe TM-30-18: IES Method for Evaluating Light Source Color Rendition, including the characterization of average color fidelity and color gamut, and hue-specific changes in chroma, hue, or fidelity. Recommended specification criteria for different end-use applications will be explained and demonstrated, including a summary of the research that led to the consensus recommendations. Attendees will become knowledgeable in interpreting the numerical and graphical output from TM-30-18 and understand how the measures can be used to predict and design for human perceptions.

What You Will Learn:

Theoretical and practical considerations important for any system intended to characterize light source color rendition
The conceptual framework for TM-30-18 as a system for evaluating light source color rendition
The components of TM-30-18, including the fidelity and gamut indices, the color vector graphic, and fidelity and chroma shift indices for each hue bin
How quantities from TM-30-18 can be used to quantify and communicate color rendition, and be employed in the design of lighting systems, the spectral design of light sources, and the specification of lighting products
How to recognize the strengths and limitations of TM-30-18, and more generally recognize the limitations of all measures of color rendition

Who Should Attend:

Color and vision scientists
Lighting professionals, including lighting equipment manufacturers
Lighting researchers that study human perceptual and biological responses to optical radiation
Neuroscientists and chronobiologists that manipulate light spectrum
Interior designers and product designers interested in how light renders the colors of their work
Anyone interested in how light and objects interact to reveal color