Wind turbines are a zero emissions solution to energy needs. But with solutions, new problems always arise. We’ve all seen the giant wind turbines towering into the sky and with any tower, there is a risk for air traffic. And how do we solve that problem? With lights. Sometimes blinking. And that has been a problem for residents in Germany who live near them. Thomas Herrholz and Dark Sky GmbH from Germany is a company that has been developing techniques to activate obstacle lighting only when it is really needed for air traffic. Their solution enabled them to realize that the lights on some wind-turbines can be turned off up to 98% of the night time. So most of the time the obstacles are illuminated for nothing! 

Mark discusses with Michael, practicing mindfulness when under the night sky. He proposes that astronomy was the first science, out of necessity. The night sky is the only view that hasn’t changed and now a large portion of humans can’t even see it. Mark says, whatever your view - clouds, streetlights - just be in the moment and enjoy what you have. (But still, let’s eliminate light pollution!) Mark Westmoquette is a mindful stargazing expert, astronomer, author and Zen teacher. Mark holds a PhD in Astrophysics and was a professional astronomer before switching gears, and now teaches yoga and mindfulness full-time. Mark has been studying Zen with Zen Master Daizan Skinner from Zenways for over 10 years. 

Michael and John discuss with Etta how to engage people with Dark Skies so as to bring them back. Etta is taking steps to do just that with her company, Visit Dark Skies, where you can immerse yourself into a true nature experience with her audio-guided stargazing. Etta Dannemann, Dipl.-Ing., has been in the lighting industry for 10 years before founding VISIT DARK SKIES GmbH, a company dedicated to the experience of the natural night sky. As a lighting designer, she has been interested in light and darkness and especially in light-related biological processes like the darkness adaptation of the human eye.

There’s air pollution, water pollution and noise pollution. Why hasn’t light pollution been recognised the same way? This is the question Michael Colligan and John Bullock tackle with Yana. Of course it takes awareness, but also commitment. And it just might be that the best way to get commitment is to get it in the books legally. It’s a complex problem that Yana is dedicated to studying, and maybe… solving? We didn’t even get into her research on space law. We’re going to have Yana back! Yana Yakushina is a practicing lawyer and researcher in the field of environmental and space law. Currently, Yana is working on her Ph.D. thesis on the legal recognition of light pollution as an environmental problem at the University of Ghent (Belgium). 

As you’ve heard on this podcast before, existing satellites are incapable of detecting the blue light of LED’s and thus produce incomplete imagery of light pollution. Ken explains to Michael how he and his colleagues are sending balloons almost 30 kilometers into the sky and beginning to map light pollution in a very unique way. 

Ken Walczak is the Senior Manager of Far Horizons at the Adler Planetarium in Chicago - a hands-on science, engineering and research program for students, volunteers and the public. He is a board member of the International Dark-Sky Association and an associate member of the IES. 

Michael discusses with Catherine Pérez Vega the question: Is light a pollutant? Catherine is researching the effects of artificial light on organisms and there is little doubt that it is. And there’s little doubt that it affects the organisms called humans, as well. Obviously modern society needs some artificial light at night, but all the other organisms don’t. As Catherine says, “how do we apply artificial lighting for our benefit, but at the same time take care of the night time?” Catherine is currently a Doctoral candidate in Biology at Freie Universität Berlin, Germany with her research taking place at the Light Pollution and Ecophysiology research group of Leibniz Institute for Freshwater Ecology and Inland Fisheries (IGB). Her work involves the interphase of ecology and architectural lighting to mitigate environmental solutions for urban lighting design applications. 

This special release of our series features Diane Knutson, a regional dark sky advocate / business owner turned Dark Sky International Board President. In this episode Greg Ehrich and Michael attempt to disentangle the need for jargon as a sales gimmick and the hurdle of hurdles jargon puts in the way of advocates and educators. Whether we end up calling what we do Night Sky Protection, Night Time Restoration or just Flipping the Switch the value of darkness at night continues to be there for the world to rediscover.

Michael and John are thrilled to have Professor Foster on the podcast. He brings his deep scientific knowledge and understanding of circadian photobiology. Russell tells us about his discovery of the third photoreceptor in the eye for which he got a lot of pushback from the scientific community in the 90’s. They don’t push back anymore. Professor Foster is the Head of Oxford’s Nuffield Laboratory of Ophthalmology, the founder and Director of the Sleep and Circadian Research Institute and is a Fellow of Brasenose College Oxford. His research addresses how circadian rhythms and sleep are generated and regulated and what happens when these systems fail as a result of societal pressures, ageing and disease. 

In this episode you get three unique perspectives on urban lighting. Co-host Michael Colligan in Canada, co-host John Bullock in the U.K and guest Kate Hickcox from The Pacific Northwest National Laboratory. They discuss the challenges of lighting populated areas. Will more light decrease crime? Will less light? Perhaps it has to do with the kind of lighting. Listen to this, then join the conversation. Kate Hickcox joined PNNL as a Lighting Research Scientist in 2020. She is a creative thinker in the field of lighting, with over 18 years of experience in both lighting research and lighting design. No matter which hat she’s wearing, her goals are simple – to provide equitable and universal lighting solutions that support humans and the environment. Kate’s unique background blends the artistic with the practical and allows for discovery of unique design solutions and innovative research-based strategies. 

As Bastian Groiss says, people see light as an enabler for vision. But light - sunlight in particular - is so much more. It triggers hormonal reactions, allows your immune system to recharge and gives the mitochondria the energy to repair your eyes. Of course healthy light during the day allows healthy darkness at night to do its thing. And stop wearing sunglasses! Bastian is of German origins with a rural upbringing. He is a former project manager, self taught wood worker and handyman, spiritual explorer, student of the Diamond Approach, ambassador for regenerative agriculture, circadian rhythms, natural light and reconnecting with nature.