Circularity and Digital Transformation

Zhaga-D4i Platforms

Dr. Mark Duffy, MD35 Consulting

Location: Nassau

March 20, 2024
10:30 am - 11:30 am EST

Credits 1 LU | Elective


The Zhaga Consortium is committed to developing standards that enable reduction of consumption for a circular economy and provide platforms supporting the digital transformation of lighting systems. In cooperation with the DALI Alliance, an eco-system of Zhaga-D4i certified products from multiple vendors gives specifiers and users confidence of plug-and-play interoperability. The Zhaga Book 18 platform for smart cities is expanded to include heritage and decorative luminaires in the newly released Edition 4.0. Zhaga Book 20 standardizes the mechanical interface, intra-luminaire communication protocol and power budget for control devices creating new opportunities for smart indoor sensors, the backbone of smart buildings.

This is an introductory course suitable for all experience levels from the student to the experienced design professional.

Learning Objectives

  • Recognize circularity economy opportunities for easy repair, upgrade and reuse when specifying Zhaga-D4i products from the multi-vendor database in smart lighting systems.
  • Appreciate the value of DALI digital control and D4i asset management in connected indoor and outdoor lighting systems.
  • Incorporate heritage and decorative luminaires in your smart city platform via the Zhaga Book 18, Edition 4.0 specifications.
  • Articulate the key aspects of the Zhaga Consortium Book 20 platform that supports smart buildings.


Dr. Mark Duffy
Dr. Mark Duffy
Independent Consultant
MD35 Consulting

Mark received his Ph.D. degree in Physics from University of Wisconsin-Madison in 1983. He joined General Electric’s Lighting Business Group in Cleveland, Ohio, in 1984. During his career he worked on a fluorescent innovation team (2.5 yrs.), lead new product development projects in metal halide (14 yrs.) and linear fluorescent lamps (2 yrs.), served as Global LFL Systems Manager (6 yrs.) and Manager of Global Industry Standards (10.5 yrs.) for GE Lighting and GE Current, a Daintree company. In 2019, he started MD35 Consulting, LLC specializing in lighting standards development for clients. He has 23 patents and 13 lighting related publications. Mark is also active in both regional and international lighting industry standards communities. He serves as Technical Advisor to US Technical Advisory Group (TAG) of IEC TC 34 Lighting and SC 34A Light Sources and as Head of the US Delegation. He also serves as convener of the advisory group on lighting systems (AG 4) to IEC TC 34. He participates in ANSI ASC C78 Lamps, C81 Bases and Holders, C82 Ballasts and Drivers and served as chair of the policy committee from 2009 – 2019. He serves as chair of ANSI ASC C137 Lighting Systems. He was involved in the National Electric Manufacturers Association serving as chair of the Lamp Section Technical Committee for 11 years. He has been involved in the CIE-USNC since 1988 and was elected as Senior Vice-President of Technology to the Executive Committee for a four-year term beginning in 2019. Most recently, he is chairing the Zhaga Consortium General Assembly. Mark is married to Evelyn and they have three children. He enjoys spending his time with his family, golfing, hiking and outdoor experiences.

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