“Reducing the need for electric power: The role of artificial lighting”

One word that characterizes the situation in the lighting industry during recent years is “change”. This change is based on the symbiotic relationship between technological development, lighting design improvement and, of course, the adoption of sustainable principles. Lighting digitization together with the widespread use of LED luminaires has led to increased device connectivity offering a wide range of possibilities. As the light is enriched now with information, it is therefore possible not only to increase energy savings through controls but also to include additional functions such as the ability to adjust the lighting system’s operation according to the users’ expectations and needs. The aforementioned developments allowed not only the manipulation of luminaire’s emitted luminous flux but also the color temperature of the light source. This is the core concept of the Human Centric Lighting which affects health, well-being and productivity providing proper lighting when and where is needed. In recent years zero energy buildings received increased attention though proper legislative pressure and this can potentially sideline the human factor from the epicenter of the build environment. Fortunately, it seems that the focus of lighting design has just moved from spaces to humans.


Lambros T. Doulos: He holds a PhD from the National Technical University of Athens (ECE School, 2010). He holds a degree in Physics (University of Athens, 1999) and a Master of Science degree in Environmental Physics (University of Athens, 2002). He is an Associate Professor at the School of Applied Arts and Sustainable Development of the Hellenic Open University with scientific subject “Lighting Technology with applications in energy optimization and the coupling of Daylight and Electric Lighting in the Human Centric Environment”. As a Researcher-Physicist he works in research programs, measurements, studies and lighting projects. To date, he has participated in 67 research projects (1 as the main Scientific Researcher) from which more than 100 publications in scientific journals, international conferences, national conferences and national press have been published. Some of his research interests are the rational use and saving of energy in lighting systems, the use of daylight in buildings, the development of innovative photosensors, the function of the human eye and the derived correlation between lighting, health and well-being, the evaluation of lighting installations in buildings, streets and tunnels, lighting design and improvement of lighting installations, street lighting, light pollution, minimizing its negative effects and creating protected areas, tunnel lighting and lighting measurements both in street, tunnel and interior areas. He has collaborations with lighting companies and has carried out numerous lighting projects and studies. He has authored 2 books on lighting design and 8 chapters of collective volumes in corresponding books. He has also participated as a member of committees of Technical Instructions and legislation (KENAK 2017, KENAK 2021, TOTEE 20701-1 / 2017, 20701-4 / 2017, 20701-7 / 2021 “Artificial and Daylighting of Buildings”), as a member of the CIE International Lighting Committee (participation in 6 technical committees) and the ISO committee (participation in 1 technical committee) in drafting instructions and regulations. He has participated as a speaker in numerous lighting conferences, he is a member of ASHRAE (President of the Hellenic Branch 2020-21) and official RELUX Certified Trainer and representative. Finally, he is an Associate Editor in the scientific journal Journal of Daylighting, (Solarlits ISSN: 2383-8701) and has been a Guest Editor in 3 special issues on lighting in 2 journals, Sustainability (MDPI ISSN: 2071-1050) and Electronics (MDPI ISSN: 2079-9292)

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