Outdoor illumination that minimizes glare and light trespass while reducing light pollution is increasingly valued. These fixtures are engineered to direct light downwards, illuminating only the intended area and preventing light from scattering upwards into the night sky. A common example is a fully shielded light fixture directed at a walkway.
The adoption of these lighting strategies offers numerous benefits. It preserves the natural nocturnal environment, enhancing astronomical observation and reducing disruption to wildlife. Reduced light pollution also contributes to energy conservation and improved human health by minimizing sleep disruption. Historically, excessive and poorly directed outdoor lights have obscured the beauty of the night sky and wasted significant energy.