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Michael Royer

Michael Royer

Pacific Northwest National Laboratory
Portland Office
620 SW FIFTH AVE, SUITE #810
Portland, OR 97204
(503) 227-1155

Biography

Dr. Michael Royer joined PNNL in 2011, and primarily works on the Advanced Lighting Science and Technology Research program. His primary research area is human factors in lighting. He conducts experiments to help refine metrics and specification guidance, with the ultimate goals of advancing lighting quality to improve building occupants' satisfaction and increasing the use of energy efficient lighting technologies. He has been instrumental to the development of ANSI/IES TM-30-18, IES Method for Evaluating Light Source Color Rendition. He has authored over 60 journal articles and government reports covering many aspects of light and its application in architectural environments.

Michael is co-chair of the Illuminating Engineering Society (IES) Vision Science committee and a member of the Color Committee and Technical Procedures Committee (TPC). He also serves on the International Commission on Illumination (CIE)-U.S. National Executive Committee and other CIE technical committees. He is an associate editor for the journal Lighting Research & Technology.

Prior to joining PNNL, Michael earned a Ph.D. in Architectural Engineering from Penn State University, receiving the 2013 Taylor Technical Talent Award from the IES for his published work, which focused on tuning optical radiation for visual and nonvisual effects.

Research Interests

  • Human factors in lighting, including color perception the relationship between light and health
  • Spectral optimization
  • Long-term performance of lighting products
  • Developing metrics for both energy-related and quality-related aspects of lighting

Education and Credentials

  • B.A.E. / M.A.E., Architectural Engineering, Penn State University, 2008
  • Ph.D., Architectural Engineering, Penn State University, 2011

PNNL Publications

2022

  • Esposito T., M.P. Royer, and K.W. Houser. 2022. "Measures of illuminant-induced metameric mismatch: Theory, comparative analysis, and implications for application." Optics Express 30, no. 9:14686-14708. PNNL-SA-167794. doi:10.1364/OE.451626
  • Houser K.W., T. Esposito, M.P. Royer, and J. Christoffersen. 2022. "A Method and Tool to Determine the Colorimetric and Photobiological Properties of Light Transmitted Through Glass and Other Optical Materials." Building and Environment 215. PNNL-SA-166975. doi:10.1016/j.buildenv.2022.108957

2021

  • Abboushi B.K., E. Rodriguez-Feo Bermudez, A.C. Irvin, B. Feagin Jr., M.P. Royer, and R.G. Davis. 2021. "Examining Perceptual Luminance Uniformity of Simulated Luminaire Patterns." In SPIE OPTO: Light-Emitting Devices, Materials, and Applications XXV, March 6-12, 2021, Online Only. Proceedings of the SPIE, edited by J.K. Kim, M.R. Krames and M. Strassburg, 11706, Paper No. 117061E. Bellingham, Washington:SPIE. PNNL-SA-159574. doi:10.1117/12.2577901

2020

  • David A., T. Esposito, K.W. Houser, M.P. Royer, K.A. Smet, and L. Whitehead. 2020. "A Vector Field Color Rendition Model for Characterizing Color Shifts and Metameric Mismatch." LEUKOS - The Journal of the Illuminating Engineering Society of North America 16, no. 2:99-114. PNNL-SA-135593. doi:10.1080/15502724.2018.1554369
  • Royer M.P., M. Wei, A. Wilkerson, and S.F. Safranek. 2020. "Experimental validation of color rendition specification criteria based on ANSI/IES TM-30-18." Lighting Research & Technology 52, no. 3:323-349. PNNL-SA-142381. doi:10.1177/1477153519857625

2019

  • Huang H., M. Wei, and M.P. Royer. 2019. "Perceived colour fidelity under LEDs with similar Rf but different Ra." Lighting Research & Technology 51, no. 6:858-869. PNNL-SA-136172. doi:10.1177/1477153519825997
  • Leon F.A., J.A. McIntosh, A.J. Rutz, N.J. Miller, and M.P. Royer. 2019. Characterizing Photometric Flicker - Handheld Meters. PNNL-28203. Richland, WA: Pacific Northwest National Laboratory. Characterizing Photometric Flicker - Handheld Meters
  • Royer M.P. 2019. "Comparing Measures of Gamut Area." LEUKOS - The Journal of the Illuminating Engineering Society of North America 15, no. 1:29-53. PNNL-SA-132222. doi:10.1080/15502724.2018.1500485
  • Royer M.P. 2019. "Evaluating tradeoffs between energy efficiency and color rendition." OSA Continuum 2, no. 8:2308-2327. PNNL-SA-141315. doi:10.1364/OSAC.2.002308

2018

  • Royer M.P. 2018. "Comparing Measures of Average Color Fidelity." LEUKOS - The Journal of the Illuminating Engineering Society of North America 14, no. 2:69-85. PNNL-SA-128752. doi:10.1080/15502724.2017.1389283
  • Royer M.P. 2018. "Opinion: Making the Most of Colour Rendition Research." Lighting Research & Technology 50, no. 3:338-339. PNNL-SA-131836. doi:10.1177/1477153518773573
  • Royer M.P. 2018. "TM-30 Guidance." LD+A Magazine 46, no. 6:24-28. PNNL-SA-134085.
  • Royer M.P., K.W. Houser, and A. David. 2018. "Chroma Shift and Gamut Shape: Going Beyond Average Color Fidelity and Gamut Area." LEUKOS - The Journal of the Illuminating Engineering Society of North America 14, no. 3:149-165. PNNL-SA-127109. doi:10.1080/15502724.2017.1372203

2017

  • Royer M.P. 2017. "What is the Reference? An Examination of Alternatives to the Reference Sources Used in IES TM-30-15." LEUKOS - The Journal of the Illuminating Engineering Society of North America 13, no. 2:71-89. PNNL-SA-119373. doi:10.1080/15502724.2016.1255146
  • Royer M.P., A. Wilkerson, M. Wei, K.W. Houser, and R.G. Davis. 2017. "Human perceptions of colour rendition vary with average fidelity, average gamut, and gamut shape." Lighting Research & Technology 49, no. 8:966-991. PNNL-SA-116963. doi:10.1177/1477153516663615
  • Royer M.P., and M. Wei. 2017. "The Role of Presented Objects in Deriving Color Preference Criteria from Psychophysical Studies." LEUKOS - The Journal of the Illuminating Engineering Society of North America 13, no. 3:143-157. PNNL-SA-121334. doi:10.1080/15502724.2016.1271339
  • Royer M.P., K.W. Houser, and A. David. 2017. "Chroma Shift and Gamut Shape: Going Beyond Average Color Fidelity and Gamut Area." In IES 2017 Annual Conference Proceedings, August 10-12, 2017, Portland, Oregon. New York, New York:Illuminating Engineering Society. PNNL-SA-127957.

2016

  • Davis L., J. Young, and M.P. Royer. 2016. CALiPER Report 20.5: Chromaticity Shift Modes of LED PAR38 Lamps Operated in Steady-State Conditions. PNNL-25201. Richland, WA: Pacific Northwest National Laboratory. CALiPER Report 20.5: Chromaticity Shift Modes of LED PAR38 Lamps Operated in Steady-State Conditions
  • Royer M.P. 2016. "IES TM-30-15 Is Approved - Now What?: Moving Forward with New Color Rendition Measures." LEUKOS - The Journal of the Illuminating Engineering Society of North America 12, no. 1-2:3-5. PNNL-SA-112850. doi:10.1080/15502724.2015.1092752
  • Royer M.P. 2016. CALiPER Report 23: Photometric Testing of White-Tunable LED Luminaires (Addendum). PNNL-25113. Richland, WA: Pacific Northwest National Laboratory. CALiPER Report 23: Photometric Testing of White-Tunable LED Luminaires (Addendum)
  • Royer M.P., and K.W. Houser. 2016. "Color Rendering: What do we want?." LD+A Magazine. PNNL-SA-121039.

2015

  • David A., P.T. Fini, K.W. Houser, Y. Ohno, M.P. Royer, K.A. Smet, and M. Wen, et al. 2015. "Development of the IES method for evaluating the color rendition of light sources." Optics Express 23, no. 12:15888-15906. PNNL-SA-111073. doi:10.1364/OE.23.015888
  • Houser K.W., M.P. Royer, and A. David. 2015. "Evaluating Light Source Color Rendition using the IES TM-30-15 Method." In 5th Professional Lighting Design Conference (PLDC 2015), October 28-31, 2015, Rome, Italy. GŁtersloh:VIA-Verlag. PNNL-SA-111641.
  • Houser K.W., M.P. Royer, and L. Whitehead. 2015. "Correspondence: In support of the IES method of evaluating light source colour rendition." Lighting Research & Technology 47, no. 8:1029-1034. PNNL-SA-113267. doi:10.1177/1477153515617392
  • Royer M.P., M.B. Merzouk, N.J. Miller, and T.A. Beeson. 2015. CALiPER Report 23: Photometric Testing of White-Tunable LED Luminaires. PNNL-24595. Richland, WA: Pacific Northwest National Laboratory. CALiPER Report 23: Photometric Testing of White-Tunable LED Luminaires
  • Royer M.P., M.E. Poplawski, C.C. Brown, and M.B. Merzouk. 2015. CALiPER Report 22.1: Photoelectric Performance of LED MR16 Lamps. PNNL-24627. Richland, WA: Pacific Northwest National Laboratory. CALiPER Report 22.1: Photoelectric Performance of LED MR16 Lamps

2014

2013

2012

Energy and Environment

Core Research Areas

Contacts