We all know cities are a big contributor to light pollution. Charlotte Gage from Adfree Cities in the United Kingdom, contends that one of the biggest offenders is digital advertising. LED’s are getting brighter and advertising signs are being left on all night, drowning out views of the night sky but also destroying people’s sleep who live nearby these signs. Charlotte, Michael and John discuss what progress has been made, about how laws haven’t caught up to digital signage, and how best to tackle this blight. Charlotte Gage is Network Director for Adfree Cities, a network of groups across the UK who are concerned about the impacts of corporate advertising on our health, wellbeing, environment, climate, communities and the local economy. Adfree Cities lobby for policy change at national and local levels, showcase alternatives, organize locally to stop new advertising sites in UK cities, and produce resources to raise awareness about the impacts of commercial advertising.