Dorin Beu is an associate professor at Technical University of Cluj-Napoca, in charge of the Lighting Engineering Laboratory (http://users.utcluj.ro/~lec). More than 30 years experience in lighting, green cities and buildings and circular economy. Member of Romanian European Energy Award (EEA city assessment which covers, building, energy, mobility and communication) project. Member of the RoGBC team that established the assessment criteria for the GREEN HOMES certification system. Chief Editor together with prof. Kim from Seoul Kyun Hee University of International Journal of Sustainable Lighting (www.lightingjournal.org)