Lighting that minimizes light pollution is designed to direct illumination downwards, shielding the light source and preventing light from scattering upwards into the night sky. An example includes fully shielded fixtures that emit light only where it is needed, reducing glare and trespass.
Such lighting systems offer several advantages, including energy conservation, improved nighttime visibility, and protection of nocturnal wildlife. Historically, concerns about wasted energy and the increasing loss of the natural night environment have driven the development and adoption of these solutions.