A luminaire designed to minimize light pollution is characterized by features that control the direction and intensity of light emitted. These fixtures typically shield the light source, preventing it from shining directly upwards, reducing glare and skyglow. An example includes a fully shielded fixture with a flat lens, directing light downwards onto the intended area.
Limiting extraneous light has significant ecological, astronomical, and energy conservation benefits. Reduced skyglow allows for better observation of the night sky, crucial for astronomical research and public enjoyment. Furthermore, mitigating light trespass protects nocturnal wildlife and reduces wasted energy associated with unnecessary illumination, contributing to lower carbon footprints and cost savings.