2023 Not All Reds are the Same (Challenges of specifying color changing LED)

Ellie Motevalian, P2S, and Toranj Noroozi, P2S

March 8, 2023

1:00pm – 2:00pm EST

Room Location: Gramercy

Credit: 1 LU / Elective

This presentation addresses the current issues regarding color-changing lighting calculations and measurement methods. In recent years, the use of color-changing fixtures has been widespread in architectural lighting, yet no standardized evaluation method calculates the color-changing light attributes. The current photometric calculation tools fail to provide adequate information, and mockups are still the only way to compare RGB light fixtures accurately.

In this presentation, we will share our conversation with various manufacturers, the concerns involved from the specifier’s point of view, and provide suggestions as to how the manufacturers can help specifiers to resolve these shortcomings.

Basic knowledge of color changing and lighting calculation are recommended for this session.


Ellie Motevalian
Lighting Designer, P2S

Ellie has a master’s degree in Building Science and Architecture. She has over 12 years of experience in architecture and lighting design. She is currently working as an architectural lighting designer at P2S. She is involved in various projects, including hospitality, healthcare, education, workspace, and civic.

Toranj Noroozi
Lighting Designer, P2S

Toranj Noroozi is an architectural lighting designer currently working at P2S.Inc in Long Beach, CA. She received her MFA degree in Theatrical Lighting Design. In the past eight years, she has been involved in various projects, including hospitality, healthcare, and education.


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