Mark Major is a lighting designer and founding partner of the multi-award winning international design practice Speirs + Major.

Mark originally trained and practised as an architect prior to focussing on the unique relationship between light and the built environment. He has worked on a wide range of award-winning lighting projects and is considered a specialist in the field of urban lighting. He was named as being a key city advisor by Monocle magazine in 2013. He also acted as the Lighting Design Advisor to the Olympic Delivery Authority for London’s Olympic and Paralympic Games in 2012.

With an active interest in architectural and lighting education Mark lectures all over the world. He spoke at TEDx at the Sydney Opera House, Australia in 2014. He has also published many articles and papers including the best-selling ‘Made of Light – the Art of Light and Architecture’ that he co-authored as part of a wider education project.

Mark is a corporate member of the Royal Institute of British Architects and the International Association of Lighting Designers. He is also a Fellow of the Royal Incorporation of Architects in Scotland. He was created a Royal Designer for Industry in 2012.

Alexander Wunsch is a physician, researcher and lecturer in light medicine and photobiology with particular interest in the effects of light and the beneficial/adverse health impacts of solar radiation and artificial light sources on endocrine and cellular levels in humans.

He conducts studies on the photobiological effects of optical (UV, VIS and IR) radiation.

In his private medical practice in Heidelberg he uses therapeutic light spectra in combination with other biophysically based treatments, and develops lighting equipment for medical and cosmetic purposes.

He is associate lecturer at the Wismar University of Applied Sciences and mentors students writing their master's theses on light- and health-related topics. Alexander Wunsch presents at international conferences and operates as a consultant for federal authorities, media, and industry.

Alexander Wunsch is a member of the German Lighting Society (LiTG) and former president and member of the International Light Association (ILA).