如何減少光害? How to reduce Light Pollution?

香港光害的主要元凶是過量和不合當的人為室外照明,要改善香港嚴重的光害問題,包括盡量減少使用不必要的室外照明、改裝現有的室外照明和留意它們的設計,使它們更對減少光害有利、和選用有利天文觀測的光源。

The main cause of light pollution in Hong Kong is the excessive and improper use of artificial outdoor lightings. The ways to reduce the light pollution include reducing as many useless outdoor lighting as possible, modifying the existing lightings and redesigning them to become more dark-sky friendly, and choosing astronomical-friendly lighting sources.