What method of security lighting uses lights slightly inside a security perimeter and directed outward?

• A. Glare projection
• B. Flood lighting
• C. Backlighting
• D. Spotlighting

Answer: (A)

The idea being tested is how the placement and direction of lighting affects visibility at a security perimeter. When lights are placed just inside the perimeter and aimed outward, they create glare that projects toward the outside. This outward glare serves as a deterrent by making the boundary zone bright for anyone approaching, while also highlighting movement near the boundary from inside the protected area. The result is that intruders see a bright, glare-filled boundary and guards or cameras can more easily notice silhouettes and movement against the contrasting exterior darkness.

This approach differs from other lighting methods: flood lighting covers large outdoor areas with broad illumination, often positioned to light the exterior but not specifically designed to push glare outward from inside; backlighting lights a subject from behind to reveal their silhouette, which is about identifying a person rather than creating outward glare at the boundary; spotlighting focuses a narrow beam on a specific area or object, not on creating a glare field around the perimeter.