Light pollution regulations and where to find them.

The growing concerns about the adverse impacts of light pollution on astronomy, the environment, biodiversity, human health, and energy use have brought increased attention to the issue on legal and political agendas. Various international frameworks and governments at different levels have taken action to mitigate the impacts of nighttime lighting. This article provides an overview of regulatory instruments adopted to protect the nocturnal environment, explaining triggers for regulatory changes, using an interdisciplinary perspective. It proposes a classification of these instruments based on their nature: (1) law or policy, (2) binding or non-binding, and by their (3) levels and (4) areas of implementation, supported by specific examples. The article identifies current shortcomings and recommends future regulatory changes to address light pollution effectively. This interdisciplinary research aims to provide a better understanding of light pollution as an environmental concern and explains the development of light pollution regulations, helping to foster interdisciplinary communication and the adoption of more adequate regulatory measures to address light pollution. Additionally, this study intends to fill the gap in legal and policy research related to light pollution.