The objective of this Working Group is to make available a robust and comprehensive set of guidelines for safe and sustainable outdoor lighting practices that promote biodiversity.

To disseminate the guidelines to a broad audience, including policymakers, lighting professionals, and the general public. Part of this work will include a review of existing best practice guidelines on light at night and an effort to enhance them for the benefit of the environment and its three natural domains:

• Astronomical – Night skies

• Terrestrial – Plants and wildlife

• Sub-aquatic – Marine plants and creatures