University of Kansas Lighting Research Group


Hongyi Cai, Ph.D., Associate Professor

The University of Kansas
CEAE Department
2134-C Learned Hall
1530 W. 15th Street, Lawrence, KS 66045, USA
Phone: (785) 864-2597
Fax: (785) 864-5631



Siqi He, visiting Ph.D. student in Architectural Technology and Science with a focus on lighting, Chongqing University, Chongqing, China. 2019-2021


Aiying Wang, Ph.D., Associate Professor in the Department of Architecture, Tianjin University, China, 2011-2013.
Her research field is daylighting and architectural lighting.

GRADUATE STUDENTS (As Committee Chair)

Ph.D. student


Hankun Li, 01/2019 - 12/2021 (expected). Hankun joined the lighting research group in summer 2017 as a Masters student. He continues his doctoral study starting in spring 2019.
Technical Improvements on Camera-Aided Lighting Measurement


Seyedeh Farzaneh Mahlab, 08/2015 - 01/2020.
Farzaneh joined the lighting research group in fall 2015 as a graduate research assistant working towards her Ph.D. degree.
“Mapping the Photometric and Circadian Metric Quantities of Light in Buildings”

M.S. student


Amjad A. Alotaibi, 01/2021 - present

Nicolas A Ruiz, 01/2020 - 05/2021
New building skin with integrative LED lighting and solar panels



Erin Mahoney, 08/2018 - 05/2019.
Using Perceived Luminance for Design and Evaluation of Energy Efficient and Sustainable Luminous Environments to Supplement Current Illuminance-Based Design Codes”


Habib ArjmandMazidi, 08/2016 - 12/2018.
“Useful Circadian Light Frequency Evaluation of A Space Equipped with Clear Glass And Optimized Shade Versus Low-E Glass Without Shade”

Hankun Li, 08/2017 - 12/2018.
Hankun joined the lighting research group in summer 2017.
A Laboratory Method for Measuring the Heat Distributions of Luminaires and Its Application in ENERGY Plus for Building Heating and Cooling Energy Saving

Reid M. Poling, 08/2017 - 05/2018.
Reid joined the lighting research group in spring 2017, will officially start in fall 2017.
“A New Method for Calculating Luminous Flux Using High Dynamic Range Imaging And Its Applications”


Simon Diederich, 08/2016 - 12/2017.
Simon joined the lighting research group in fall 2016.
“Development and Commissioning of a Calorimeter for Testing the Thermal Performance of Luminaires”


Hanna Kurian, M.S. student, 01/2015 - 05/2016.
Hanna joined the lighting research group in Spring 2015.
"Camera-Aided Glare Analysis in Sports Arenas"

Rex Jeffries, M.S. student, 01/2015 - 05/2016.
Rex joined the lighting research group as a home grown undergraduate student in fall 2014. He was working with Dr. Cai as a graduate research assistant.
"Feasibility Study on Reducing Pixel Resolution of Raw HDR Images for Calibration of Sky Luminance Measurement"


Taneasha Roberts, M.S. student, 01/2015 - 12/2015.
Taneasha joined the lighting research group in spring 2015.
"Hybrid Renewable Energy System: Pumped Hydrogen Storage System Or Battery-Bank Storage System Model Design and Cost Analysis"

Meredith A. Nelson, M.S. student, 08/2014 - 05/2015.
Meredith joined the lighting research group as a home grown undergraduate student in spring 2014. She worked with Dr. Cai as an undergraduate and graduate research assistant.
"Qualified Light-Emitting-Diode (LED) Luminaires for Kansas Roadways and Their Implementation Cost Analysis"

Mariam Saifan, M.S. student, 08/2012 - 01/2015.
Mariam joined the lighting research group in August 2012. She received his bachelaor degree in 2012 in Architectural Engineering at KU.
"Exploration of High Dynamic Range Photography as A Useful Tool for Lighting Design"


Linjie Li, M.S. student, 08/2011 - 01/2013.
Linjie joined the lighting research group in August 2011 as a graduate research assistant. He received his bachelaor degree in 2011 in Lighting Engineering at Fudan University, Shanghai, China. After graduation, Linjie started working full time with Cree. Inc.
"Impact of New Lighting Technologies on Office Ergonomics"



Nicolas A. Ruiz, undergraduate student, 2018-present


Haider Mohamed, Ph.D. student, 2015-2016
Mohammed Alshayeb, Ph.D. student, 2015-2016
Jeehwan Lee, Ph.D. student, 2015-2016

Zhenyu Hu, M.S. student, 2014
Arun P. Kuppusamy, M.S. student, 2014

Benjamin P. Anderson, undergraduate student, 2014-2015
Kevin Garrett, undergraduate student, 2013-2014
Bradley Prewitt, undergraduate student, 2013-2014
Guide Rungamornchai, undergraduate student, 2012-2013
Stephan Olson, undergraduate student, 2011
Andrew Leicht, undergraduate student, 2011


The KU-IES student chapter makes it more attractive to KU students by providing more learning and practicing opportunities in local lighting industry such as field trips, factory visits, training classes, internships, etc. Additionally, the KU lighting program is reaching out to the lighting industry to create more opportunities for our students, including joint research, collaborated projects, development of lighting products, and continuous education such as online / distance learning programs, etc.

(Example photos of lighting field trips)