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May 9, 2018 1
Predicting Spectral Effects in
Architectural Spaces Sarah Safranek Lighting Research Engineer
Pacific Northwest National Laboratory
LIGHTFAIR 2018
Chicago, IL
May 9, 2018 2
DOE SSL and Color Tuning
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MATERIAL PROPERTIES
SOURCE PROPERTIES
VIEW POINT
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Modeling a UK NICU Patient Room
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1. Dawn/Dusk Mode
2. Day Mode
3. Exam Mode
Tools Available for Spectral Calculations
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Lighting Research Center – Circadian Stimulus Calculator
http://www.lrc.rpi.edu/cscalculator/
Modeling Spectral Effects: AGi32
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Tools Intended for Spectral Calculations
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Visible Spectrum
• Utilizes Radiance
• Grasshopper plugin
• Open source
9 Channels
3 Channels
81 Channels
• Utilizes Radiance
• Simulation interface
• Library of materials, luminaires
Modeling Spectral Effects: LARK
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For information and tutorials : http://faculty.washington.edu/inanici/Lark/Lark_home_page.html
Modeling Spectral Effects: ALFA
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For information : https://www.solemma.com/Alfa.html
What's next?
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For more information on GATEWAY reports: https://www.energy.gov/eere/ssl/gateway-evaluations
• How do underlying assumptions of calculation process impact accuracy?
• How will spectral prediction tools be used to make more informed lighting designs?
• What are the energy implications of incorporating spectral prediction tools into the lighting design process?
